feat: stabilize MTProto streaming and unify cache schema

- Fixed ReferenceError in /stream/ route
- Unified Redis cdn_path schema to JSON metadata
- Updated proxy-stream to pass media type to HF Space
- Fixed admin data stripping in jsonResponse
- Cleaned up legacy music bot code

app.py

@@ -167,7 +167,7 @@ async def vault_media(request: VaultRequest, background_tasks: BackgroundTasks,
     return {"status": "accepted", "message": "Vaulting started"}
 
 @app.get("/proxy-stream/{file_id}")
-async def proxy_stream(file_id: str, secret: str = Header(None)):
+async def proxy_stream(file_id: str, type: str = "audio", secret: str = Header(None)):
     if secret != SECRET_TOKEN:
         raise HTTPException(status_code=401, detail="Unauthorized")
 
@@ -179,7 +179,8 @@ async def proxy_stream(file_id: str, secret: str = Header(None)):
         except Exception as e:
             print(f"[Stream] MTProto Error: {str(e)}")
 
-    return StreamingResponse(stream_generator(), media_type="audio/mpeg")
+    media_type = "video/mp4" if type == "video" else "audio/mpeg"
+    return StreamingResponse(stream_generator(), media_type=media_type)
 
 @app.get("/health")
 async def health():