optimize buildFieldMapsFromFlatObjectMetadata usages (#16132)

This newly introduced util can be a bit expensive especially when done
recursively.
This PR improves that


File | Pattern Fixed | Impact
-- | -- | --
format-result.util.ts | Recursive array/object processing | N array
items → 1 call
format-data.util.ts | Recursive array processing | N array items → 1
call
process-nested-relations-v2.helper.ts | Duplicate call in call chain | 2
calls → 1 call
common-result-getters.service.ts | Per-record processing in array | N
records → 1 call
compute-relation-connect-query-configs.util.ts | Nested loop (entities ×
connect fields) | N×M calls → 1 call

packages/twenty-server/src/engine/twenty-orm/entity-manager/workspace-entity-manager.spec.ts

@@ -13,6 +13,7 @@ import { type FlatFieldMetadata } from 'src/engine/metadata-modules/flat-field-m
 import { type FlatObjectMetadata } from 'src/engine/metadata-modules/flat-object-metadata/types/flat-object-metadata.type';
 import { type WorkspaceDataSource } from 'src/engine/twenty-orm/datasource/workspace.datasource';
 import { validateOperationIsPermittedOrThrow } from 'src/engine/twenty-orm/repository/permissions.utils';
+import { getObjectMetadataFromEntityTarget } from 'src/engine/twenty-orm/utils/get-object-metadata-from-entity-target.util';
 
 import { WorkspaceEntityManager } from './workspace-entity-manager';
 
@@ -23,7 +24,7 @@ jest.mock('src/engine/twenty-orm/repository/permissions.utils', () => ({
 jest.mock(
   'src/engine/twenty-orm/utils/get-object-metadata-from-entity-target.util',
   () => ({
-    getObjectMetadataFromEntityTarget: jest.fn().mockReturnValue({}),
+    getObjectMetadataFromEntityTarget: jest.fn(),
   }),
 );
 
@@ -117,6 +118,10 @@ describe('WorkspaceEntityManager', () => {
       updatedAt: new Date(),
     };
 
+    (getObjectMetadataFromEntityTarget as jest.Mock).mockReturnValue(
+      mockFlatObjectMetadata,
+    );
+
     const mockFlatFieldMetadata: FlatFieldMetadata = {
       id: 'field-id',
       type: 'TEXT' as FieldMetadataType,