Seeding Attachments, Disable ORM Logs, Seeding Parallelization (#15174)

Improvements to database seeding performance and developer experience.

**Changes:**

1. **Attachment seeding**: Add sample files (PDF, XLSX, PPTX, PNG, ZIP)
to dev seeds with proper file storage
2. **Seeding parallelization**: Process entities within batches in
parallel while respecting dependencies
3. **ORM query logging**: Replace manual logger toggling with
`ORM_QUERY_LOGGING` env var
- Values: `disabled` (default), `server-only` (for local dev), `always`
- Configured once in `core.datasource.ts`, removed from all seeder
services

**For .env:**
```bash
ORM_QUERY_LOGGING=server-only
```

Net result: Faster seeding, cleaner code (-68 lines), better local dev
experience.

packages/twenty-server/src/engine/workspace-manager/dev-seeder/metadata/services/dev-seeder-metadata.service.ts

@@ -124,7 +124,11 @@ export class DevSeederMetadataService {
       });
     }
 
-    await this.seedCoreViews({ workspaceId, dataSourceMetadata, featureFlags });
+    await this.seedCoreViews({
+      workspaceId,
+      dataSourceMetadata,
+      featureFlags,
+    });
   }
 
   private async seedCustomObject({