feat: Add quota check decorator and implement tenant-level API rate limiting

- Add quota check decorator module quota_stub.py, providing community edition stub implementation
- Add quota check decorators to multiple controllers
- Implement tenant-level API call rate limiting
- Remove redundant plan fields from tenant_model.py
- Optimize user permission check logic with added error handling

api/app/controllers/ontology_controller.py

@@ -28,6 +28,8 @@ from fastapi import APIRouter, Depends, HTTPException, File, UploadFile, Form, H
 from fastapi.responses import StreamingResponse, JSONResponse
 from sqlalchemy.orm import Session
 
+from app.core.quota_stub import check_ontology_project_quota
+
 from app.core.config import settings
 from app.core.error_codes import BizCode
 from app.core.language_utils import get_language_from_header
@@ -287,6 +289,7 @@ async def extract_ontology(
 # ==================== 本体场景管理接口 ====================
 
 @router.post("/scene", response_model=ApiResponse)
+@check_ontology_project_quota
 async def create_scene(
     request: SceneCreateRequest,
     db: Session = Depends(get_db),