fix: fix insert attachments

Author: nichenqin

apps/backend/src/modules/file/file.ts

@@ -47,7 +47,7 @@ export class FileService {
               url,
               size,
               mime_type: mimeType,
-              created_at: new Date(),
+              created_at: new Date().getTime(),
               created_by: getCurrentUserId(),
               space_id: mustGetCurrentSpaceId(),
               name: fileName,

packages/persistence/src/record/record.mutate-visitor.ts

@@ -108,7 +108,7 @@ export class RecordMutateVisitor extends AbstractQBMutationVisitor implements IR
               return {
                 size: value.size,
                 url: value.url,
-                created_at: new Date(),
+                created_at: new Date().getTime(),
                 created_by: userId,
                 space_id: spaceId,
                 id: value.id,