Migrate metadata cache (#16030)

## Context
Deprecating legacy ObjectMetadata from cache in favor of flat entities.
Introducing utils to build byName/byNameSingular/byNamePlural in
isolated cases

## Next
- I had to introduce a util to build from flat to legacy
objectMetadataMaps, we should instead use flat maps directly when needed
(datasource, schema generation, etc)
- Deprecate metadata version in the cache
- Use the new cache strategy for flat entities with permissions and
feature flags and inject in the global datasource context

packages/twenty-server/src/engine/middlewares/middleware.module.ts

@@ -3,7 +3,7 @@ import { Module } from '@nestjs/common';
 import { TokenModule } from 'src/engine/core-modules/auth/token/token.module';
 import { JwtModule } from 'src/engine/core-modules/jwt/jwt.module';
 import { DataSourceModule } from 'src/engine/metadata-modules/data-source/data-source.module';
-import { WorkspaceMetadataCacheModule } from 'src/engine/metadata-modules/workspace-metadata-cache/workspace-metadata-cache.module';
+import { WorkspaceManyOrAllFlatEntityMapsCacheModule } from 'src/engine/metadata-modules/flat-entity/services/workspace-many-or-all-flat-entity-maps-cache.module';
 import { MiddlewareService } from 'src/engine/middlewares/middleware.service';
 import { WorkspaceCacheStorageModule } from 'src/engine/workspace-cache-storage/workspace-cache-storage.module';
 
@@ -11,7 +11,7 @@ import { WorkspaceCacheStorageModule } from 'src/engine/workspace-cache-storage/
   imports: [
     DataSourceModule,
     WorkspaceCacheStorageModule,
-    WorkspaceMetadataCacheModule,
+    WorkspaceManyOrAllFlatEntityMapsCacheModule,
     TokenModule,
     JwtModule,
   ],