fix: restore isCustom gate in metadata label resolvers (#21432)

## Context

#21228 removed the stored `isCustom` column and, with it, the `isCustom`
early-return in `resolveObjectMetadataStandardOverride` /
`resolveFieldMetadataStandardOverride`, on the assumption that falling
through the `standardOverrides` checks was equivalent.

It isn't: custom object/field labels now reach the Lingui lookup. A
custom label that collides with a standard catalog string (e.g. a custom
field labeled "Status") gets translated for non-English locales against
the user's intent, and every other custom label pays a hash + catalog
miss — and, in production, an "Uncompiled message detected" warning
(#21415) — on each metadata resolution.

## Fix

Restore the gate. `isCustom` is no longer stored, so call sites that
build the resolver input from flat entities (dataloader,
minimal-metadata, view controller, command-menu-item navigation context)
derive it via `belongsToTwentyStandardApp`; GraphQL resolvers keep
passing DTOs, which already carry the derived value.

## Testing

- Unit tests for both resolvers, including a new regression test: a
custom label matching a standard catalog entry is returned verbatim,
Lingui never called.

---------

Co-authored-by: Weiko <corentin@twenty.com>

packages/twenty-server/src/engine/subscriptions/metadata-event/utils/__tests__/enrich-command-menu-item-event-with-resolved-navigation.util.spec.ts

@@ -11,6 +11,7 @@ import {
 } from 'src/engine/metadata-modules/flat-command-menu-item/utils/build-navigation-flat-command-menu-item.util';
 import { type FlatObjectMetadata } from 'src/engine/metadata-modules/flat-object-metadata/types/flat-object-metadata.type';
 import { enrichCommandMenuItemEventWithResolvedNavigation } from 'src/engine/subscriptions/metadata-event/utils/enrich-command-menu-item-event-with-resolved-navigation.util';
+import { TWENTY_STANDARD_APPLICATION } from 'src/engine/workspace-manager/twenty-standard-application/constants/twenty-standard-applications';
 
 const mockI18nInstance = {
   _: (messageId: string) => messageId,
@@ -26,6 +27,8 @@ const makeFlatObjectMetadata = (
     universalIdentifier: 'obj-uid-1',
     workspaceId: 'ws-1',
     applicationId: 'app-1',
+    applicationUniversalIdentifier:
+      TWENTY_STANDARD_APPLICATION.universalIdentifier,
     labelPlural: 'People',
     labelSingular: 'Person',
     icon: 'IconUser',

packages/twenty-server/src/engine/subscriptions/metadata-event/utils/enrich-command-menu-item-event-with-resolved-navigation.util.ts

@@ -12,6 +12,7 @@ import { FlatCommandMenuItem } from 'src/engine/metadata-modules/flat-command-me
 import { type FlatEntityMaps } from 'src/engine/metadata-modules/flat-entity/types/flat-entity-maps.type';
 import { findFlatEntityByIdInFlatEntityMaps } from 'src/engine/metadata-modules/flat-entity/utils/find-flat-entity-by-id-in-flat-entity-maps.util';
 import { type FlatObjectMetadata } from 'src/engine/metadata-modules/flat-object-metadata/types/flat-object-metadata.type';
+import { belongsToTwentyStandardApp } from 'src/engine/metadata-modules/utils/belongs-to-twenty-standard-app.util';
 
 type EnrichCommandMenuItemEventArgs = {
   record: FlatCommandMenuItem;
@@ -48,7 +49,10 @@ export const enrichCommandMenuItemEventWithResolvedNavigation = ({
   }
 
   const context = buildNavigationInterpolationContext({
-    objectMetadata: flatObjectMetadata,
+    objectMetadata: {
+      ...flatObjectMetadata,
+      isCustom: !belongsToTwentyStandardApp(flatObjectMetadata),
+    },
     locale,
     i18nInstance,
   });