Identify standard field do deploy until IS_WORKSPACE_CREATION_V2_ENABLED is enabled in prod (#16981)

# Introduction

fixes https://github.com/twentyhq/twenty/issues/16905

Do not merge until `IS_WORKSPACE_CREATION_V2_ENABLED` has been activated
by default, and so sync metadata has been deprecated by doing so. As the
sync metadata will attempt to insert `null` `applicationId` and
`universalIdentifier` values while creating a workspace

In this PR we're introducing a new `SyncableEntityRequired` which
enforces the non nullable `applicationId` and `universalIdentifier` on
extending entity

In this PR we also migrate the field metadata entity to extend the
required

## Identification upgrade command
This command will search for workspace field metadata entities that
aren't associated to an applicationId, dispatch them to either the
workspace-custom `applicationId` or the twenty-standard `applicationId`.
For the standard entities it will also set their universal identifier
based on the `STANDARD_OBJECTS` const hashmap

## Typeorm migration
As the non nullable `applicationId` and `universalIdentifier`migration
won't pass in the first we've been using the save point and upgrade
command migration fallback pattern

## Tests
Tested the command on a prod extract locally

Both `twenty-eng` and `twenty-for-twenty` have unexpected standard
objects
Please note that we will deprecate the `isCustom` and `standardId` col
later in the future

### Twenty-eng
```ts
[Nest] 98971  - 01/01/2026, 3:18:00 PM     LOG [IdentifyStandardEntitiesCommand] Successfully validated 600/600 field metadata update(s) for workspace 9870323e-22c3-4d14-9b7f-5bdc84f7d6ee (309 custom, 291 standard)
[Nest] 98971  - 01/01/2026, 3:18:00 PM    WARN [IdentifyStandardEntitiesCommand] Found 35 warning(s) while processing field metadata for workspace 9870323e-22c3-4d14-9b7f-5bdc84f7d6ee. These fields will become custom.
```

### Twenty for twenty

### Just created workspace

packages/twenty-server/src/database/commands/upgrade-version-command/upgrade.command.ts

@@ -24,6 +24,8 @@ import { FixNanPositionValuesInNotesCommand } from 'src/database/commands/upgrad
 import { MigratePageLayoutWidgetConfigurationCommand } from 'src/database/commands/upgrade-version-command/1-15/1-15-migrate-page-layout-widget-configuration.command';
 import { BackfillOpportunityOwnerFieldCommand } from 'src/database/commands/upgrade-version-command/1-16/1-16-backfill-opportunity-owner-field.command';
 import { BackfillStandardPageLayoutsCommand } from 'src/database/commands/upgrade-version-command/1-16/1-16-backfill-standard-page-layouts.command';
+import { IdentifyFieldMetadataCommand } from 'src/database/commands/upgrade-version-command/1-16/1-16-identify-field-metadata.command';
+import { MakeFieldMetadataUniversalIdentifierAndApplicationIdNotNullableMigrationCommand } from 'src/database/commands/upgrade-version-command/1-16/1-16-make-field-metadata-universal-identifier-and-application-id-not-nullable-migration.command';
 import { UpdateTaskOnDeleteActionCommand } from 'src/database/commands/upgrade-version-command/1-16/1-16-update-task-on-delete-action.command';
 import { TwentyConfigService } from 'src/engine/core-modules/twenty-config/twenty-config.service';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
@@ -67,6 +69,8 @@ export class UpgradeCommand extends UpgradeCommandRunner {
     protected readonly updateTaskOnDeleteActionCommand: UpdateTaskOnDeleteActionCommand,
     protected readonly backfillOpportunityOwnerFieldCommand: BackfillOpportunityOwnerFieldCommand,
     protected readonly backfillStandardPageLayoutsCommand: BackfillStandardPageLayoutsCommand,
+    protected readonly identifyFieldMetadataCommand: IdentifyFieldMetadataCommand,
+    protected readonly makeFieldMetadataUniversalIdentifierAndApplicationIdNotNullableMigrationCommand: MakeFieldMetadataUniversalIdentifierAndApplicationIdNotNullableMigrationCommand,
   ) {
     super(
       workspaceRepository,
@@ -104,6 +108,9 @@ export class UpgradeCommand extends UpgradeCommandRunner {
       this.updateTaskOnDeleteActionCommand,
       this.backfillOpportunityOwnerFieldCommand,
       this.backfillStandardPageLayoutsCommand,
+      this.identifyFieldMetadataCommand,
+      this
+        .makeFieldMetadataUniversalIdentifierAndApplicationIdNotNullableMigrationCommand,
     ];
 
     this.allCommands = {