perf(app): optimize FileMetadata queries by batching lookups

Multiple services were performing individual database queries for FileMetadata when resolving missing file names/sizes. This change batches the queries using `in_()` to reduce database round trips and improve performance.

api/app/services/app_dsl_service.py

@@ -279,7 +279,7 @@ class AppDslService:
         tenant_id: uuid.UUID,
         warnings: list,
         now: datetime.datetime,
-    ) -> tuple[type(App), list]:
+    ) -> tuple[App, list[str]]:
         """覆盖已有应用的配置，类型不一致时抛出异常"""
         app = self.db.query(App).filter(
             App.id == app_id,