3108fe1dff
- Backend (FastAPI): - Attachment and AttachmentVersion models with migration - FileStorageService with SHA-256 checksum validation - File type validation (whitelist/blacklist) - Full CRUD API with version control support - Audit trail integration for upload/download/delete - Configurable upload directory and file size limit - Frontend (React + Vite): - AttachmentUpload component with drag & drop - AttachmentList component with download/delete - TaskAttachments combined component - Attachments service for API calls - Testing: - 12 tests for storage service and API endpoints - OpenSpec: - add-document-management change archived 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>