Add effects upload endpoint

- New /effects/upload endpoint for uploading effect files
- Parses PEP 723 dependencies and @-tag metadata
- Lists, gets, and deletes effects by content hash

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/__init__.py

@@ -55,7 +55,7 @@ def create_app() -> FastAPI:
         return JSONResponse({"detail": "Not found"}, status_code=404)
 
     # Include routers
-    from .routers import auth, storage, api, recipes, cache, runs, home
+    from .routers import auth, storage, api, recipes, cache, runs, home, effects
 
     # Home and auth routers (root level)
     app.include_router(home.router, tags=["home"])
@@ -74,6 +74,9 @@ def create_app() -> FastAPI:
     # Also mount cache router at /media for convenience
     app.include_router(cache.router, prefix="/media", tags=["media"])
 
+    # Effects router
+    app.include_router(effects.router, prefix="/effects", tags=["effects"])
+
     return app