chore: complete v1.0 milestone

Archive v1.0 MVP: 7 phases, 13 plans, 27/27 requirements.

- Archive roadmap to milestones/v1.0-ROADMAP.md
- Archive requirements to milestones/v1.0-REQUIREMENTS.md
- Move milestone audit into milestones/
- Create MILESTONES.md with v1.0 entry
- Evolve PROJECT.md: move shipped requirements to Validated,
  update Context with stack/LOC, log Key Decisions with outcomes
- Collapse ROADMAP.md to one-line milestone summary
- Update STATE.md to shipped status
- Back-fill stale requirements-completed frontmatter on
  02-01, 04-01, 05-01, 06-01 SUMMARY.md files

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

.planning/phases/02-driver-management/02-01-SUMMARY.md

@@ -28,6 +28,7 @@ metrics:
   completed: "2026-04-10"
   tasks: 1
   files: 6
+requirements-completed: [DRV-02]
 ---
 
 # Phase 02 Plan 01: INF Parser Service Summary

.planning/phases/04-script-generation/04-01-SUMMARY.md

@@ -33,6 +33,7 @@ metrics:
   files_modified: 0
   tests_added: 7
   tests_passing: 68
+requirements-completed: [SCRPT-01, SCRPT-04, SCRPT-05]
 ---
 
 # Phase 4 Plan 01: Script Generator (Install) Summary

.planning/phases/05-package-export/05-01-SUMMARY.md

@@ -37,6 +37,7 @@ metrics:
   completed_date: "2026-04-10"
   tasks_completed: 1
   files_modified: 3
+requirements-completed: [PKG-01, PKG-02, PKG-03]
 ---
 
 # Phase 5 Plan 1: Package Export Endpoints Summary

.planning/phases/06-wire-icon-intunewin/06-01-SUMMARY.md

@@ -23,6 +23,7 @@ metrics:
   completed: "2026-04-10"
   tasks_completed: 1
   files_modified: 2
+requirements-completed: [PKG-04]
 ---
 
 # Phase 06 Plan 01: Wire Icon into .intunewin Export Summary