Identification cleanup (#17301)

# Introduction

following https://github.com/twentyhq/twenty/pull/17279
As we've finally identified all the syncable metadata entities, which
means they're expected to have non nullable applicationId and
universalIdentifier at pg_level we can remove previous retro comp
universalIdentifier fallbacking and update the dto too

~~This needs IdentifyRemainingEntitiesMetadataCommand and
MakeRemainingEntitiesUniversalIdentifierAndApplicationIdNotNullableMigrationCommand
to be run~~
```ts
[Nest] 197  - 01/21/2026, 3:08:35 PM     LOG [MakeRemainingEntitiesUniversalIdentifierAndApplicationIdNotNullableMigrationCommand] Successfully run MakeRemainingEntitiesUniversalIdentifierAndApplicationIdNotNullableMigrationCommand
```

packages/twenty-server/src/engine/metadata-modules/flat-view/utils/from-create-view-input-to-flat-view-to-create.util.ts

@@ -62,7 +62,7 @@ export const fromCreateViewInputToFlatViewToCreate = ({
     openRecordIn: createViewInput.openRecordIn ?? ViewOpenRecordIn.SIDE_PANEL,
     position: createViewInput.position ?? 0,
     type: createViewInput.type ?? ViewType.TABLE,
-    universalIdentifier: createViewInput.universalIdentifier ?? viewId,
+    universalIdentifier: createViewInput.universalIdentifier ?? v4(),
     visibility: createViewInput.visibility ?? ViewVisibility.WORKSPACE,
     createdByUserWorkspaceId: createdByUserWorkspaceId ?? null,
     viewFieldIds: [],

packages/twenty-server/src/engine/metadata-modules/flat-view/utils/from-view-entity-to-flat-view.util.ts

@@ -15,9 +15,7 @@ export const fromViewEntityToFlatView = (viewEntity: ViewEntity): FlatView => {
     createdAt: viewEntity.createdAt.toISOString(),
     updatedAt: viewEntity.updatedAt.toISOString(),
     deletedAt: viewEntity.deletedAt?.toISOString() ?? null,
-    universalIdentifier:
-      viewEntityWithoutRelations.universalIdentifier ??
-      viewEntityWithoutRelations.id,
+    universalIdentifier: viewEntityWithoutRelations.universalIdentifier,
     viewFieldIds: viewEntity.viewFields.map((viewField) => viewField.id),
     viewFilterIds: viewEntity.viewFilters.map((viewFilter) => viewFilter.id),
     viewGroupIds: viewEntity.viewGroups.map((viewGroup) => viewGroup.id),