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/repositories/user_repository.py

@@ -297,6 +297,10 @@ def get_user_by_id(db: Session, user_id: uuid.UUID) -> Optional[User]:
     """根据ID获取用户"""
     return UserRepository(db).get_user_by_id(user_id)
 
+def get_user_by_id_regardless_active(db: Session, user_id: uuid.UUID) -> Optional[User]:
+    """根据ID获取用户（不过滤 is_active，用于启用/禁用场景）"""
+    return db.query(User).filter(User.id == user_id).first()
+
 def get_user_by_email(db: Session, email: str) -> Optional[User]:
     """根据邮箱获取用户"""
     return UserRepository(db).get_user_by_email(email)