perf: fix N+1 query issues in user group access control validation

- Pre-fetch user group IDs in get_*_by_user_id methods across models layer
- Pass user_group_ids to has_access to avoid repeated group queries
- Reduce query count from 1+N to 1+1 pattern for access control validation
- Apply consistent optimization across knowledge, models, notes, prompts, and tools

Signed-off-by: Sihyeon Jang <sihyeon.jang@navercorp.com>

backend/open_webui/models/models.py

@@ -5,6 +5,7 @@ from typing import Optional
 from open_webui.internal.db import Base, JSONField, get_db
 from open_webui.env import SRC_LOG_LEVELS
 
+from open_webui.models.groups import Groups
 from open_webui.models.users import Users, UserResponse
 
 
@@ -199,11 +200,12 @@ class ModelsTable:
         self, user_id: str, permission: str = "write"
     ) -> list[ModelUserResponse]:
         models = self.get_models()
+        user_group_ids = {group.id for group in Groups.get_groups_by_member_id(user_id)}
         return [
             model
             for model in models
             if model.user_id == user_id
-            or has_access(user_id, permission, model.access_control)
+            or has_access(user_id, permission, model.access_control, user_group_ids)
         ]
 
     def get_model_by_id(self, id: str) -> Optional[ModelModel]: