Implement comprehensive deletion cascade logic, upload enhancements, and alias
management updates for Phase 2 Part 2 of the API refactoring.
**Upload Enhancements (Section 5):**
- POST /api/v1/images/upload now supports flowAlias parameter
- Eager flow creation: creates flow record immediately when flowAlias provided
- FlowId logic: undefined → generate UUID, null → keep null, UUID → use provided
- Automatically assigns flowAlias in flow.aliases JSONB upon upload
**Alias Management (Section 6):**
- Removed alias from PUT /api/v1/images/:id request body
- Only focalPoint and meta can be updated via PUT endpoint
- Use dedicated PUT /api/v1/images/:id/alias endpoint for alias assignment
**Deletion Strategy Overhaul (Section 7):**
- **ImageService.hardDelete()** with MinIO cleanup and cascades:
- Deletes physical file from MinIO storage
- Cascades: sets outputImageId=NULL in related generations
- Cascades: removes alias entries from flow.aliases
- Cascades: removes imageId from generation.referencedImages arrays
- MVP approach: proceeds with DB cleanup even if MinIO fails
- **GenerationService.delete()** with conditional logic:
- If output image WITHOUT alias → hard delete both image and generation
- If output image WITH alias → keep image, delete generation only, set generationId=NULL
- **FlowService.delete()** with cascade and alias protection:
- Deletes all generations (uses conditional delete logic)
- Deletes all images WITHOUT alias
- Keeps images WITH alias (sets flowId=NULL)
- Deletes flow record from database
**Type Updates:**
- UploadImageRequest: Added flowAlias parameter (string)
- UpdateImageRequest: Removed alias field (Section 6.1)
- GenerationResponse: Updated prompt fields to match reversed semantics
- prompt: string (what was actually used for generation)
- originalPrompt: string | null (user's original, only if enhanced)
- DeleteImageResponse: Changed to { id: string } (hard delete, no deletedAt)
**Error Constants (Section 11):**
- Removed: GENERATION_ALREADY_SUCCEEDED, MAX_RETRY_COUNT_EXCEEDED
- Added: SCOPE_INVALID_FORMAT, SCOPE_CREATION_DISABLED,
SCOPE_GENERATION_LIMIT_EXCEEDED, STORAGE_DELETE_FAILED
**Technical Notes:**
- Hard delete replaces soft delete throughout the system
- Cascade operations maintain referential integrity
- Alias protection ensures valuable images are preserved
- All Phase 2 Part 2 code compiles with zero new TypeScript errors
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Oleg Proskurin
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