Implemented dataloader for relation metadata (#4891)

- Implemented dataloader package on metadata graphql server
- Implemented a dataloader for relation metadata module

---------

Co-authored-by: Jérémy M <jeremy.magrin@gmail.com>

packages/twenty-server/src/engine/api/graphql/metadata-graphql-api.module.ts

@@ -10,14 +10,16 @@ import { GraphQLConfigModule } from 'src/engine/api/graphql/graphql-config/graph
 import { metadataModuleFactory } from 'src/engine/api/graphql/metadata.module-factory';
 import { EnvironmentService } from 'src/engine/integrations/environment/environment.service';
 import { ExceptionHandlerService } from 'src/engine/integrations/exception-handler/exception-handler.service';
+import { DataloaderModule } from 'src/engine/dataloaders/dataloader.module';
+import { DataloaderService } from 'src/engine/dataloaders/dataloader.service';
 
 @Module({
   imports: [
     GraphQLModule.forRootAsync<YogaDriverConfig>({
       driver: YogaDriver,
       useFactory: metadataModuleFactory,
-      imports: [GraphQLConfigModule],
-      inject: [EnvironmentService, ExceptionHandlerService],
+      imports: [GraphQLConfigModule, DataloaderModule],
+      inject: [EnvironmentService, ExceptionHandlerService, DataloaderService],
     }),
     MetadataEngineModule,
     WorkspaceMigrationRunnerModule,

packages/twenty-server/src/engine/api/graphql/metadata.module-factory.ts

@@ -7,10 +7,12 @@ import { useExceptionHandler } from 'src/engine/integrations/exception-handler/h
 import { useThrottler } from 'src/engine/api/graphql/graphql-config/hooks/use-throttler';
 import { MetadataGraphQLApiModule } from 'src/engine/api/graphql/metadata-graphql-api.module';
 import { renderApolloPlayground } from 'src/engine/utils/render-apollo-playground.util';
+import { DataloaderService } from 'src/engine/dataloaders/dataloader.service';
 
 export const metadataModuleFactory = async (
   environmentService: EnvironmentService,
   exceptionHandlerService: ExceptionHandlerService,
+  dataloaderService: DataloaderService,
 ): Promise<YogaDriverConfig> => {
   const config: YogaDriverConfig = {
     autoSchemaFile: true,
@@ -32,6 +34,9 @@ export const metadataModuleFactory = async (
       }),
     ],
     path: '/metadata',
+    context: () => ({
+      loaders: dataloaderService.createLoaders(),
+    }),
   };
 
   if (environmentService.get('DEBUG_MODE')) {