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-front/src/modules/auth/states/currentWorkspaceState.ts

@@ -13,7 +13,7 @@ export type CurrentWorkspace = Pick<
   | 'activationStatus'
   | 'currentBillingSubscription'
   | 'workspaceMembersCount'
-  | 'currentCacheVersion'
+  | 'metadataVersion'
 >;
 
 export const currentWorkspaceState = createState<CurrentWorkspace | null>({