[fix]:[FL-42][修正模型导入清单]

Co-authored-by: multica-agent <github@multica.ai>

api/app/models/__init__.py

@@ -4,13 +4,12 @@ Import all model modules during package initialization so SQLAlchemy can
 resolve string-based relationships regardless of route/service import order.
 """
 
-from . import atp_model, audit_log, auth_session, calendar_event, elevation, file_storage, fl_analysis, lightning_event, lightning_sample, line, line_tower, menu, model_registry, object_group, rbac, requirement, system_param, todo, tower_model, tower_profile, user, worker_registry
+from . import atp_model, audit_log, auth_session, elevation, file_storage, fl_analysis, lightning_event, lightning_sample, line, line_tower, menu, object_group, rbac, system_param, tower_model, tower_profile, user, worker_registry
 
 __all__ = [
     "atp_model",
     "audit_log",
     "auth_session",
-    "calendar_event",
     "elevation",
     "file_storage",
     "fl_analysis",
@@ -19,12 +18,9 @@ __all__ = [
     "line",
     "line_tower",
     "menu",
-    "model_registry",
     "object_group",
     "rbac",
-    "requirement",
     "system_param",
-    "todo",
     "tower_model",
     "tower_profile",
     "user",