feat: 用户表添加selected_audio_id字段，添加用户音频绑定接口

app/routes/user_route.py

@@ -96,4 +96,11 @@ async def download_audio(audio_id:int, db: Session = Depends(get_db)):
 @router.delete('/users/audio/{audio_id}',response_model=AudioDeleteResponse)
 async def delete_audio(audio_id:int, db: Session = Depends(get_db)):
     response = await delete_audio_handler(audio_id, db)
+    return response
+
+
+#用户绑定音频
+@router.post('/users/audio/bind',response_model=AudioBindResponse)
+async def bind_audio(bind_req:AudioBindRequest, db: Session = Depends(get_db)):
+    response = await bind_audio_handler(bind_req, db)
     return response