chore(release): bump to v0.11.0

Operator-facing polish release on top of v0.10.0's SFM integration:
- Soft-remove monitoring locations (preserves history)
- Per-unit deployment Gantt chart
- Merge consecutive same-location assignments
- Delete assignment for mis-clicks (with safety check)
- Drag-to-reorder location cards (HTML5 native)
- Three-dot kebab menu replaces inline pill buttons
- Event count on vibration cards (instead of "Sessions: 0")
- Project overview location map (replaces Upcoming Actions)
- Stricter backfill location matcher (no false positives on
  boilerplate-shared names like "Area 1" vs "Area 2")
- 3× JSON.stringify quote-collision bug fixes (Remove button,
  backfill typeahead, project-merge dropdown)
- Merge-project modal min-height fix
- Leaflet stacking-context fix (no more map-over-modal)
- delete_assignment column name fix (start_time → started_at)

Migrations added this release:
- migrate_add_location_removed.py
- migrate_add_location_sort_order.py

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/main.py

@@ -30,7 +30,7 @@ Base.metadata.create_all(bind=engine)
 ENVIRONMENT = os.getenv("ENVIRONMENT", "production")
 
 # Initialize FastAPI app
-VERSION = "0.10.0"
+VERSION = "0.11.0"
 if ENVIRONMENT == "development":
     _build = os.getenv("BUILD_NUMBER", "0")
     if _build and _build != "0":