rm id field on dataset

app.py

@@ -18,7 +18,6 @@ app = FastAPI(title="MuscleCare FastAPI Server")
 
 # ----- 모델 -----
 class DatasetItem(BaseModel):
-    id: Optional[int] = None
     user_id: str
     session_id: Optional[str] = None
     window_id: int
@@ -113,7 +112,6 @@ async def upload_dataset(payload: DatasetBatchPayload):
 
         # 새 스키마 정의
         target_cols = [
-            "id",
             "user_id",
             "session_id",
             "window_id",