Refactor metadata caching (#7011)

This PR introduces the following changes:
- add the metadataVersion to all our metadata cache keys to ease
troubleshooting:
<img width="1146" alt="image"
src="https://github.com/user-attachments/assets/8427805b-e07f-465e-9e69-1403652c8b12">
- introduce a cache recompute lock to avoid overloading the database to
recompute the cache many time

packages/twenty-server/src/engine/twenty-orm/twenty-orm-global.manager.ts

@@ -47,6 +47,10 @@ export class TwentyORMGlobalManager {
   }
 
   async getDataSourceForWorkspace(workspaceId: string) {
-    return this.workspaceDataSourceFactory.create(workspaceId, null);
+    return await this.workspaceDataSourceFactory.create(workspaceId, null);
+  }
+
+  async loadDataSourceForWorkspace(workspaceId: string) {
+    await this.workspaceDataSourceFactory.create(workspaceId, null);
   }
 }