Refactor sound and extraction services to include user and timestamp fields

- Updated ExtractionInfo to include user_id, created_at, and updated_at fields.
- Modified ExtractionService to return user and timestamp information in extraction responses.
- Enhanced sound serialization in PlayerState to include extraction URL if available.
- Adjusted PlaylistRepository to load sound extractions when retrieving playlist sounds.
- Added tests for new fields in extraction and sound endpoints, ensuring proper response structure.
- Created new test file endpoints for sound downloads and thumbnail retrievals, including success and error cases.
- Refactored various test cases for consistency and clarity, ensuring proper mocking and assertions.

app/api/v1/__init__.py

@@ -2,7 +2,17 @@
 
 from fastapi import APIRouter
 
-from app.api.v1 import admin, auth, extractions, main, player, playlists, socket, sounds
+from app.api.v1 import (
+    admin,
+    auth,
+    extractions,
+    files,
+    main,
+    player,
+    playlists,
+    socket,
+    sounds,
+)
 
 # V1 API router with v1 prefix
 api_router = APIRouter(prefix="/v1")
@@ -10,6 +20,7 @@ api_router = APIRouter(prefix="/v1")
 # Include all route modules
 api_router.include_router(auth.router, tags=["authentication"])
 api_router.include_router(extractions.router, tags=["extractions"])
+api_router.include_router(files.router, tags=["files"])
 api_router.include_router(main.router, tags=["main"])
 api_router.include_router(player.router, tags=["player"])
 api_router.include_router(playlists.router, tags=["playlists"])