feat: Implement database schema and video entity with TypeORM (Day 3-4)

[GiorgiZanqaidze]

Reviewing the branch to summarize changes for the merge request:

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Merge Request Title

feat: Implement database schema and video entity with TypeORM (Day 3-4)

Merge Request Description

Implements Day 3-4 deliverables: PostgreSQL database schema, Video entity with status tracking, and database connection.

### Changes
- ✅ Configured TypeORM with PostgreSQL in app.module.ts
- ✅ Created Video entity with UUID, status enum, and required fields
- ✅ Implemented VideosModule and VideosService with full CRUD operations
- ✅ Added Swagger documentation for API endpoints
- ✅ Created test endpoints for video upload and retrieval
- ✅ Added comprehensive logging to VideosService

### Files Added
- `apps/api/src/app/videos/entities/video.entity.ts` - Video entity with status enum
- `apps/api/src/app/videos/videos.module.ts` - Videos feature module
- `apps/api/src/app/videos/videos.service.ts` - CRUD service with logging
- `apps/api/src/app/videos/dto/create-video.dto.ts` - DTO for video creation
- `apps/api/src/app/videos/dto/upload-video.dto.ts` - DTO for file uploads

### Files Modified
- `apps/api/src/app/app.module.ts` - Added TypeORM configuration and VideosModule
- `apps/api/src/app/app.controller.ts` - Added test endpoints with Swagger docs
- `apps/api/src/main.ts` - Added Swagger UI configuration

### Status Enum
UPLOADING → UPLOADED → QUEUED → PROCESSING → COMPLETED/FAILED

### Testing
- Database connection verified
- Test endpoints available at `/api/test-video` (POST) and `/api/test-videos` (GET)
- Swagger UI available at `/api/docs`

### Next Steps
- Day 5-6: MinIO Storage Service implementation
- Day 7: Streaming upload endpoint with busboy

[nx-cloud]

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☁️ Nx Cloud last updated this comment at 2025-12-10 18:52:09 UTC