feat(canvas): build and securely deliver cloud artifacts - #73874

canvas.0002_source_version_required
  └─ #1 ⚠️ AlterField
     Field alteration may cause table locks or data loss (check if changing type or constraints)
     model: canvasbuild, field: source_version, field_type: ForeignKey

canvas.0003_migrate_desktop_tree
  └─ #1 ⚠️ RunPython: RunPython data migration needs review for performance

canvas.0005_backfill_build_enqueued_at
  └─ #1 ⚠️ RunPython: RunPython data migration needs review for performance

canvas.0006_require_build_enqueued_at
  └─ #1 ⚠️ AlterField
     Field alteration may cause table locks or data loss (check if changing type or constraints)
     model: canvasbuild, field: enqueued_at, field_type: DateTimeField

tasks.0081_channelcontextgeneration_channelinstructions_and_more
  └─ #1 ✅ CreateModel
     Creating new table is safe
     model: ChannelContextGeneration
  └─ #2 ✅ CreateModel
     Creating new table is safe
     model: ChannelInstructions
  └─ #3 ✅ CreateModel
     Creating new table is safe
     model: ChannelStar
  │
  └──> ℹ️  INFO:
       ℹ️  Skipped operations on newly created tables (empty tables
       don't cause lock contention).

canvas.0001_initial
  └─ #1 ✅ CreateModel
     Creating new table is safe
     model: Canvas
  └─ #2 ✅ CreateModel
     Creating new table is safe
     model: CanvasBuild
  └─ #3 ✅ AddField
     Adding nullable field requires brief lock
     model: canvas, field: published_build
  └─ #4 ✅ CreateModel
     Creating new table is safe
     model: CanvasSourceVersion
  └─ #5 ✅ AddField
     Adding nullable field requires brief lock
     model: canvasbuild, field: source_version
  └─ #6 ✅ AddField
     Adding nullable field requires brief lock
     model: canvas, field: current_source_version
  │
  └──> ℹ️  INFO:
       ℹ️  Skipped operations on newly created tables (empty tables
       don't cause lock contention).

canvas.0004_build_enqueued_at
  └─ #1 ✅ AddField
     Adding nullable field requires brief lock
     model: canvasbuild, field: enqueued_at

posthog.1285_drop_desktop_file_system
  └─ #1 ✅ SeparateDatabaseAndState: Only state operations (no database changes)