fix(user): add user retrieval regardless of active status and update DSL config enrichment

Added `get_user_by_id_regardless_active` in user repository to support activation/deactivation workflows, updated `user_service` to use it, and refactored `_enrich_release_config` in `app_dsl_service` to accept `default_model_config_id` as a parameter instead of reading from config dict.

api/app/services/user_service.py

@@ -285,7 +285,7 @@ def activate_user(db: Session, user_id_to_activate: uuid.UUID, current_user: Use
     try:
         # 查找用户
         business_logger.debug(f"查找待激活用户: {user_id_to_activate}")
-        db_user = user_repository.get_user_by_id(db, user_id=user_id_to_activate)
+        db_user = user_repository.get_user_by_id_regardless_active(db, user_id=user_id_to_activate)
         if not db_user:
             business_logger.warning(f"用户不存在: {user_id_to_activate}")
             raise BusinessException("用户不存在", code=BizCode.USER_NOT_FOUND)