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/metadata-modules/workspace-metadata-version/services/workspace-metadata-version.service.ts

@@ -5,20 +5,22 @@ import { isDefined } from 'twenty-shared/utils';
 import { Repository } from 'typeorm';
 
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
-import { WorkspaceMetadataCacheService } from 'src/engine/metadata-modules/workspace-metadata-cache/services/workspace-metadata-cache.service';
+import { WorkspaceManyOrAllFlatEntityMapsCacheService } from 'src/engine/metadata-modules/flat-entity/services/workspace-many-or-all-flat-entity-maps-cache.service';
 import {
   WorkspaceMetadataVersionException,
   WorkspaceMetadataVersionExceptionCode,
 } from 'src/engine/metadata-modules/workspace-metadata-version/exceptions/workspace-metadata-version.exception';
+import { WorkspaceCacheStorageService } from 'src/engine/workspace-cache-storage/workspace-cache-storage.service';
 
 @Injectable()
 export class WorkspaceMetadataVersionService {
-  logger = new Logger(WorkspaceMetadataCacheService.name);
+  logger = new Logger(WorkspaceMetadataVersionService.name);
 
   constructor(
     @InjectRepository(WorkspaceEntity)
     private readonly workspaceRepository: Repository<WorkspaceEntity>,
-    private readonly workspaceMetadataCacheService: WorkspaceMetadataCacheService,
+    private readonly flatEntityMapsCacheService: WorkspaceManyOrAllFlatEntityMapsCacheService,
+    private readonly workspaceCacheStorageService: WorkspaceCacheStorageService,
   ) {}
 
   async incrementMetadataVersion(workspaceId: string): Promise<void> {
@@ -42,8 +44,18 @@ export class WorkspaceMetadataVersionService {
       { metadataVersion: newMetadataVersion },
     );
 
-    await this.workspaceMetadataCacheService.recomputeMetadataCache({
+    await this.workspaceCacheStorageService.setMetadataVersion(
       workspaceId,
+      newMetadataVersion,
+    );
+
+    await this.flatEntityMapsCacheService.invalidateFlatEntityMaps({
+      workspaceId,
+      flatMapsKeys: [
+        'flatObjectMetadataMaps',
+        'flatFieldMetadataMaps',
+        'flatIndexMaps',
+      ],
     });
   }
 }

packages/twenty-server/src/engine/metadata-modules/workspace-metadata-version/workspace-metadata-version.module.ts

@@ -2,7 +2,7 @@ import { Module } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
 
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
-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 { WorkspaceMetadataVersionService } from 'src/engine/metadata-modules/workspace-metadata-version/services/workspace-metadata-version.service';
 import { WorkspaceCacheStorageModule } from 'src/engine/workspace-cache-storage/workspace-cache-storage.module';
 
@@ -10,7 +10,7 @@ import { WorkspaceCacheStorageModule } from 'src/engine/workspace-cache-storage/
   imports: [
     TypeOrmModule.forFeature([WorkspaceEntity]),
     WorkspaceCacheStorageModule,
-    WorkspaceMetadataCacheModule,
+    WorkspaceManyOrAllFlatEntityMapsCacheModule,
   ],
   exports: [WorkspaceMetadataVersionService],
   providers: [WorkspaceMetadataVersionService],