Backfill package json for custom and standard app (#17681)

# Backfill application package files for custom and standard apps

- Backfill `package.json` / `yarn.lock` (and related fields) for
existing workspaces; new standard/custom apps get default dependency
files.
- Default package files under
`application/constants/default-package-files/`; util with hardcoded
checksums (comment on how to regenerate).
- New **FileFolder.Dependencies** for app dependency files;
**writeFile_v2** accepts optional `queryRunner` for transactional
writes.

Usages:
- **Upgrade command** `upgrade:1-17:backfill-application-package-files`:
standard/custom apps → default files; other apps → from logic function
layer.
- **Workspace creation**: create workspace with
`workspaceCustomApplicationId` first, then create application (enables
same-transaction insert). Migration makes workspace/application/file FKs
deferrable.
-  dev seeder

packages/twenty-server/src/engine/core-modules/auth/services/sign-in-up.service.ts

@@ -465,26 +465,19 @@ export class SignInUpService {
       isWorkEmailFound && (await isLogoUrlValid()) ? logoUrl : undefined;
 
     const workspaceId = v4();
+    const workspaceCustomApplicationId = v4();
     const queryRunner = this.dataSource.createQueryRunner();
 
     await queryRunner.connect();
     await queryRunner.startTransaction();
 
     try {
-      const workspaceCustomApplication =
-        await this.applicationService.createWorkspaceCustomApplication(
-          {
-            workspaceId,
-          },
-          queryRunner,
-        );
-
       const workspaceToCreate = this.workspaceRepository.create({
         id: workspaceId,
         subdomain: await this.subdomainManagerService.generateSubdomain(
           isWorkEmailFound ? { userEmail: email } : {},
         ),
-        workspaceCustomApplicationId: workspaceCustomApplication.id,
+        workspaceCustomApplicationId,
         displayName: '',
         inviteHash: v4(),
         activationStatus: WorkspaceActivationStatus.PENDING_CREATION,
@@ -496,6 +489,14 @@ export class SignInUpService {
         workspaceToCreate,
       );
 
+      await this.applicationService.createWorkspaceCustomApplication(
+        {
+          workspaceId,
+          applicationId: workspaceCustomApplicationId,
+        },
+        queryRunner,
+      );
+
       const isExistingUser = userData.type === 'existingUser';
       const user = isExistingUser
         ? userData.existingUser