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>

imptune/db/models.py

@@ -1,5 +1,9 @@
 """Peewee ORM models — full schema for phases 1-5."""
-from datetime import datetime
+from datetime import UTC, datetime
+
+
+def _utcnow():
+    return datetime.now(UTC).replace(tzinfo=None)
 
 from peewee import (
     BooleanField,
@@ -24,7 +28,7 @@ class Client(BaseModel):
     """Represents a deployment target (AD client / OU)."""
 
     name = CharField(unique=True)
-    created_at = DateTimeField(default=datetime.utcnow)
+    created_at = DateTimeField(default=_utcnow)
 
     class Meta:
         table_name = "client"
@@ -36,7 +40,7 @@ class Driver(BaseModel):
     sha256 = CharField(unique=True, index=True)
     original_filename = CharField()
     size_bytes = IntegerField()
-    uploaded_at = DateTimeField(default=datetime.utcnow)
+    uploaded_at = DateTimeField(default=_utcnow)
     driver_desc = CharField(null=True)
     inf_filename = CharField(null=True)
     architecture = CharField(null=True)
@@ -58,8 +62,8 @@ class Printer(BaseModel):
     color_mode = BooleanField(default=True)
     paper_size = CharField(default="A4")
     collate = BooleanField(default=True)
-    created_at = DateTimeField(default=datetime.utcnow)
-    updated_at = DateTimeField(default=datetime.utcnow)
+    created_at = DateTimeField(default=_utcnow)
+    updated_at = DateTimeField(default=_utcnow)
 
     class Meta:
         table_name = "printer"
@@ -72,7 +76,7 @@ class Icon(BaseModel):
     sha256 = CharField()
     original_filename = CharField()
     size_bytes = IntegerField()
-    uploaded_at = DateTimeField(default=datetime.utcnow)
+    uploaded_at = DateTimeField(default=_utcnow)
 
     class Meta:
         table_name = "icon"