Improve performance twenty orm (#6691)

## Context

As we grow, the messaging scripts are experiencing performance issues
forcing us to temporarily disable them on the cloud.
While investigating the performance, I have noticed that generating the
entity schema (for twentyORM) in the repository is taking ~500ms locally
on my Mac M2 so likely more on pods. Caching the entitySchema then!

I'm also clarifying naming around schemaVersion and cacheVersions ==>
both are renamed workspaceMetadataVersion and migrated to the workspace
table (the workspaceCacheVersion table is dropped).

packages/twenty-server/src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job.ts

@@ -33,6 +33,8 @@ export class CalendarEventListFetchJob {
 
   @Process(CalendarEventListFetchJob.name)
   async handle(data: CalendarEventsImportJobData): Promise<void> {
+    console.time('CalendarEventListFetchJob time');
+
     const { workspaceId, calendarChannelId } = data;
 
     const calendarChannelRepository =
@@ -91,5 +93,6 @@ export class CalendarEventListFetchJob {
       default:
         break;
     }
+    console.timeEnd('CalendarEventListFetchJob time');
   }
 }