chore: complete v1.0 milestone

Archive 5 phases (36 plans) to milestones/v1.0-phases/.
Archive roadmap, requirements, and audit to milestones/.
Evolve PROJECT.md with shipped state and validated requirements.
Collapse ROADMAP.md to one-line milestone summary.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/milestones/v1.0-phases/04-bulk-operations-and-provisioning/04-05-PLAN.md

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+---
+phase: 04
+plan: 05
+title: BulkSiteService Implementation
+status: pending
+wave: 1
+depends_on:
+  - 04-01
+files_modified:
+  - SharepointToolbox/Services/BulkSiteService.cs
+  - SharepointToolbox.Tests/Services/BulkSiteServiceTests.cs
+autonomous: true
+requirements:
+  - BULK-03
+  - BULK-04
+  - BULK-05
+
+must_haves:
+  truths:
+    - "BulkSiteService creates Team sites using PnP Framework TeamSiteCollectionCreationInformation"
+    - "BulkSiteService creates Communication sites using CommunicationSiteCollectionCreationInformation"
+    - "Team sites require alias and at least one owner (validated by CsvValidationService upstream)"
+    - "BulkOperationRunner handles per-site error reporting and cancellation"
+    - "Each created site URL is logged for user reference"
+  artifacts:
+    - path: "SharepointToolbox/Services/BulkSiteService.cs"
+      provides: "Bulk site creation via PnP Framework"
+      exports: ["BulkSiteService"]
+  key_links:
+    - from: "BulkSiteService.cs"
+      to: "BulkOperationRunner.cs"
+      via: "per-site delegation"
+      pattern: "BulkOperationRunner.RunAsync"
+    - from: "BulkSiteService.cs"
+      to: "PnP.Framework.Sites.SiteCollection"
+      via: "CreateAsync extension method"
+      pattern: "CreateSiteAsync|CreateAsync"
+---
+
+# Plan 04-05: BulkSiteService Implementation
+
+## Goal
+
+Implement `BulkSiteService` for creating multiple SharePoint sites in bulk from CSV rows. Uses PnP Framework `SiteCollection.CreateAsync` with `TeamSiteCollectionCreationInformation` for Team sites and `CommunicationSiteCollectionCreationInformation` for Communication sites. Per-site error reporting via `BulkOperationRunner`.
+
+## Context
+
+`IBulkSiteService`, `BulkSiteRow`, and `BulkOperationRunner` are from Plan 04-01. PnP.Framework 1.18.0 is already installed. Site creation is async on the SharePoint side (Pitfall 3 from research) — the `CreateAsync` method returns when the site is provisioned, but a Team site may take 2-3 minutes.
+
+Key research findings:
+- `ctx.CreateSiteAsync(TeamSiteCollectionCreationInformation)` creates Team site (M365 Group-connected)
+- `ctx.CreateSiteAsync(CommunicationSiteCollectionCreationInformation)` creates Communication site
+- Team sites MUST have alias and at least one owner
+- Communication sites need a URL in format `https://tenant.sharepoint.com/sites/alias`
+
+## Tasks
+
+### Task 1: Implement BulkSiteService
+
+**Files:**
+- `SharepointToolbox/Services/BulkSiteService.cs`
+
+**Action:**
+
+```csharp
+using Microsoft.SharePoint.Client;
+using PnP.Framework.Sites;
+using Serilog;
+using SharepointToolbox.Core.Models;
+using SharepointToolbox.Infrastructure.Auth;
+
+namespace SharepointToolbox.Services;
+
+public class BulkSiteService : IBulkSiteService
+{
+    public async Task<BulkOperationSummary<BulkSiteRow>> CreateSitesAsync(
+        ClientContext adminCtx,
+        IReadOnlyList<BulkSiteRow> rows,
+        IProgress<OperationProgress> progress,
+        CancellationToken ct)
+    {
+        return await BulkOperationRunner.RunAsync(
+            rows,
+            async (row, idx, token) =>
+            {
+                var siteUrl = await CreateSingleSiteAsync(adminCtx, row, progress, token);
+                Log.Information("Created site: {Name} ({Type}) at {Url}", row.Name, row.Type, siteUrl);
+            },
+            progress,
+            ct);
+    }
+
+    private static async Task<string> CreateSingleSiteAsync(
+        ClientContext adminCtx,
+        BulkSiteRow row,
+        IProgress<OperationProgress> progress,
+        CancellationToken ct)
+    {
+        if (row.Type.Equals("Team", StringComparison.OrdinalIgnoreCase))
+        {
+            return await CreateTeamSiteAsync(adminCtx, row, progress, ct);
+        }
+        else if (row.Type.Equals("Communication", StringComparison.OrdinalIgnoreCase))
+        {
+            return await CreateCommunicationSiteAsync(adminCtx, row, progress, ct);
+        }
+        else
+        {
+            throw new InvalidOperationException($"Unknown site type: {row.Type}. Expected 'Team' or 'Communication'.");
+        }
+    }
+
+    private static async Task<string> CreateTeamSiteAsync(
+        ClientContext adminCtx,
+        BulkSiteRow row,
+        IProgress<OperationProgress> progress,
+        CancellationToken ct)
+    {
+        var owners = ParseEmails(row.Owners);
+        var members = ParseEmails(row.Members);
+
+        var creationInfo = new TeamSiteCollectionCreationInformation
+        {
+            DisplayName = row.Name,
+            Alias = row.Alias,
+            Description = string.Empty,
+            IsPublic = false,
+            Owners = owners.ToArray(),
+        };
+
+        progress.Report(new OperationProgress(0, 0, $"Creating Team site: {row.Name}..."));
+
+        using var siteCtx = await adminCtx.CreateSiteAsync(creationInfo);
+        siteCtx.Load(siteCtx.Web, w => w.Url);
+        await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(siteCtx, progress, ct);
+
+        var siteUrl = siteCtx.Web.Url;
+
+        // Add additional members if specified
+        if (members.Count > 0)
+        {
+            foreach (var memberEmail in members)
+            {
+                ct.ThrowIfCancellationRequested();
+                try
+                {
+                    var user = siteCtx.Web.EnsureUser(memberEmail);
+                    siteCtx.Load(user);
+                    await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(siteCtx, progress, ct);
+
+                    // Add to Members group
+                    var membersGroup = siteCtx.Web.AssociatedMemberGroup;
+                    membersGroup.Users.AddUser(user);
+                    await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(siteCtx, progress, ct);
+                }
+                catch (Exception ex)
+                {
+                    Log.Warning("Failed to add member {Email} to {Site}: {Error}",
+                        memberEmail, row.Name, ex.Message);
+                }
+            }
+        }
+
+        return siteUrl;
+    }
+
+    private static async Task<string> CreateCommunicationSiteAsync(
+        ClientContext adminCtx,
+        BulkSiteRow row,
+        IProgress<OperationProgress> progress,
+        CancellationToken ct)
+    {
+        // Build the site URL from alias or sanitized name
+        var alias = !string.IsNullOrWhiteSpace(row.Alias) ? row.Alias : SanitizeAlias(row.Name);
+        var tenantUrl = new Uri(adminCtx.Url);
+        var siteUrl = $"https://{tenantUrl.Host}/sites/{alias}";
+
+        var creationInfo = new CommunicationSiteCollectionCreationInformation
+        {
+            Title = row.Name,
+            Url = siteUrl,
+            Description = string.Empty,
+        };
+
+        progress.Report(new OperationProgress(0, 0, $"Creating Communication site: {row.Name}..."));
+
+        using var siteCtx = await adminCtx.CreateSiteAsync(creationInfo);
+        siteCtx.Load(siteCtx.Web, w => w.Url);
+        await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(siteCtx, progress, ct);
+
+        var createdUrl = siteCtx.Web.Url;
+
+        // Add owners and members if specified
+        var owners = ParseEmails(row.Owners);
+        var members = ParseEmails(row.Members);
+
+        foreach (var ownerEmail in owners)
+        {
+            ct.ThrowIfCancellationRequested();
+            try
+            {
+                var user = siteCtx.Web.EnsureUser(ownerEmail);
+                siteCtx.Load(user);
+                await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(siteCtx, progress, ct);
+
+                var ownersGroup = siteCtx.Web.AssociatedOwnerGroup;
+                ownersGroup.Users.AddUser(user);
+                await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(siteCtx, progress, ct);
+            }
+            catch (Exception ex)
+            {
+                Log.Warning("Failed to add owner {Email} to {Site}: {Error}",
+                    ownerEmail, row.Name, ex.Message);
+            }
+        }
+
+        foreach (var memberEmail in members)
+        {
+            ct.ThrowIfCancellationRequested();
+            try
+            {
+                var user = siteCtx.Web.EnsureUser(memberEmail);
+                siteCtx.Load(user);
+                await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(siteCtx, progress, ct);
+
+                var membersGroup = siteCtx.Web.AssociatedMemberGroup;
+                membersGroup.Users.AddUser(user);
+                await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(siteCtx, progress, ct);
+            }
+            catch (Exception ex)
+            {
+                Log.Warning("Failed to add member {Email} to {Site}: {Error}",
+                    memberEmail, row.Name, ex.Message);
+            }
+        }
+
+        return createdUrl;
+    }
+
+    private static List<string> ParseEmails(string commaSeparated)
+    {
+        if (string.IsNullOrWhiteSpace(commaSeparated))
+            return new List<string>();
+
+        return commaSeparated
+            .Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
+            .Where(e => !string.IsNullOrWhiteSpace(e))
+            .ToList();
+    }
+
+    private static string SanitizeAlias(string name)
+    {
+        // Remove special characters, spaces -> dashes, lowercase
+        var sanitized = new string(name
+            .Where(c => char.IsLetterOrDigit(c) || c == ' ' || c == '-')
+            .ToArray());
+        return sanitized.Replace(' ', '-').ToLowerInvariant();
+    }
+}
+```
+
+**Verify:**
+```bash
+dotnet build SharepointToolbox/SharepointToolbox.csproj --no-restore -q
+```
+
+**Done:** BulkSiteService compiles. Creates Team sites (with alias + owners) and Communication sites (with generated URL) via PnP Framework. Per-site error handling via BulkOperationRunner.
+
+### Task 2: Create BulkSiteService unit tests
+
+**Files:**
+- `SharepointToolbox.Tests/Services/BulkSiteServiceTests.cs`
+
+**Action:**
+
+```csharp
+using SharepointToolbox.Core.Models;
+using SharepointToolbox.Services;
+
+namespace SharepointToolbox.Tests.Services;
+
+public class BulkSiteServiceTests
+{
+    [Fact]
+    public void BulkSiteService_Implements_IBulkSiteService()
+    {
+        Assert.True(typeof(IBulkSiteService).IsAssignableFrom(typeof(BulkSiteService)));
+    }
+
+    [Fact]
+    public void BulkSiteRow_DefaultValues()
+    {
+        var row = new BulkSiteRow();
+        Assert.Equal(string.Empty, row.Name);
+        Assert.Equal(string.Empty, row.Alias);
+        Assert.Equal(string.Empty, row.Type);
+        Assert.Equal(string.Empty, row.Template);
+        Assert.Equal(string.Empty, row.Owners);
+        Assert.Equal(string.Empty, row.Members);
+    }
+
+    [Fact]
+    public void BulkSiteRow_ParsesCommaSeparatedEmails()
+    {
+        var row = new BulkSiteRow
+        {
+            Name = "Test Site",
+            Alias = "test-site",
+            Type = "Team",
+            Owners = "admin@test.com, user@test.com",
+            Members = "member1@test.com,member2@test.com"
+        };
+
+        Assert.Equal("Test Site", row.Name);
+        Assert.Contains("admin@test.com", row.Owners);
+    }
+
+    [Fact(Skip = "Requires live SharePoint admin context")]
+    public async Task CreateSitesAsync_TeamSite_CreatesWithOwners()
+    {
+    }
+
+    [Fact(Skip = "Requires live SharePoint admin context")]
+    public async Task CreateSitesAsync_CommunicationSite_CreatesWithUrl()
+    {
+    }
+
+    [Fact(Skip = "Requires live SharePoint admin context")]
+    public async Task CreateSitesAsync_MixedTypes_HandlesEachCorrectly()
+    {
+    }
+}
+```
+
+**Verify:**
+```bash
+dotnet build SharepointToolbox.slnx --no-restore -q && dotnet test SharepointToolbox.Tests --no-build --filter "FullyQualifiedName~BulkSiteService" -q
+```
+
+**Done:** BulkSiteService tests pass (3 pass, 3 skip). Service compiles with Team + Communication site creation.
+
+**Commit:** `feat(04-05): implement BulkSiteService with PnP Framework site creation`