fix tool icon get failed (#6375)

Co-authored-by: songyawen <songyawen@zkme.xyz>

api/core/tools/tool_manager.py

                 provider: ApiToolProvider = db.session.query(ApiToolProvider).filter(
                     ApiToolProvider.tenant_id == tenant_id,
                     ApiToolProvider.id == provider_id
-                )
+                ).first()
                 return json.loads(provider.icon)
             except:
                 return {

api/services/app_service.py

                     try:
                         provider: ApiToolProvider = db.session.query(ApiToolProvider).filter(
                             ApiToolProvider.id == provider_id
-                        )
+                        ).first()
                         meta['tool_icons'][tool_name] = json.loads(provider.icon)
                     except:
                         meta['tool_icons'][tool_name] = {