fix(server): skip callRecordings widget in calendar-event page sync when field is absent (#21967)

## Context

On main's auto-upgrade, `SyncCalendarEventRecordPageCommand` (2.15.0
workspace command) failed for workspaces that don't have the
call-recording feature metadata, aborting the upgrade with:

```
Migration action 'create' for 'pageLayoutWidget' (universalIdentifier: f473b435-...) failed
Caused by: Field metadata not found for universal identifier: 48d6d151-... (calendarEvent.callRecordings)
```

## Root cause

The command always included the `callRecordings` page-layout widget.
That widget's configuration references the
`calendarEvent.callRecordings` relation field (`48d6d151`). Workspaces
that never had the `callRecording` object / relation field synced fail
transpilation with `ENTITY_NOT_FOUND`, and since one workspace failure
aborts the segment, the whole upgrade stops.

On the affected environment, ~half of active/suspended workspaces lack
both the `callRecording` object and the `calendarEvent.callRecordings`
field.

## Fix

Only add the `callRecordings` widget when the `callRecordings` field
actually exists in the workspace (checked via
`flatFieldMetadataMaps.byUniversalIdentifier`). This mirrors the
command's existing guard on the `calendarEvent` object. Workspaces
without the field still get the fields / participants / timeline
widgets; the callRecordings widget is simply skipped.

The view fields for the record page do not reference `callRecordings`,
so only the widget needed guarding.

## Test plan
- [x] `nx typecheck twenty-server`
- [x] `oxlint --type-aware` on the changed file: 0 errors
- [ ] CI

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packages/twenty-server/src/database/commands/upgrade-version-command/2-15/2-15-workspace-command-1800000002000-sync-calendar-event-record-page.command.ts

@@ -61,12 +61,17 @@ const CALENDAR_EVENT_PAGE_LAYOUT_WIDGET_UNIVERSAL_IDENTIFIERS = [
     .widgets.fields.universalIdentifier,
   STANDARD_PAGE_LAYOUT_UNIVERSAL_IDENTIFIERS.calendarEventRecordPage.tabs.home
     .widgets.participants.universalIdentifier,
-  STANDARD_PAGE_LAYOUT_UNIVERSAL_IDENTIFIERS.calendarEventRecordPage.tabs.home
-    .widgets.callRecordings.universalIdentifier,
   STANDARD_PAGE_LAYOUT_UNIVERSAL_IDENTIFIERS.calendarEventRecordPage.tabs
     .timeline.widgets.timeline.universalIdentifier,
 ];
 
+const CALENDAR_EVENT_CALL_RECORDINGS_WIDGET_UNIVERSAL_IDENTIFIER =
+  STANDARD_PAGE_LAYOUT_UNIVERSAL_IDENTIFIERS.calendarEventRecordPage.tabs.home
+    .widgets.callRecordings.universalIdentifier;
+
+const CALENDAR_EVENT_CALL_RECORDINGS_FIELD_UNIVERSAL_IDENTIFIER =
+  STANDARD_OBJECTS.calendarEvent.fields.callRecordings.universalIdentifier;
+
 @RegisteredWorkspaceCommand('2.15.0', 1800000002000)
 @Command({
   name: 'upgrade:2-15:sync-calendar-event-record-page',
@@ -96,6 +101,7 @@ export class SyncCalendarEventRecordPageCommand extends ActiveOrSuspendedWorkspa
 
     const {
       flatObjectMetadataMaps,
+      flatFieldMetadataMaps,
       flatViewMaps,
       flatViewFieldMaps,
       flatViewFieldGroupMaps,
@@ -104,6 +110,7 @@ export class SyncCalendarEventRecordPageCommand extends ActiveOrSuspendedWorkspa
       flatPageLayoutWidgetMaps,
     } = await this.workspaceCacheService.getOrRecompute(workspaceId, [
       'flatObjectMetadataMaps',
+      'flatFieldMetadataMaps',
       'flatViewMaps',
       'flatViewFieldMaps',
       'flatViewFieldGroupMaps',
@@ -125,6 +132,19 @@ export class SyncCalendarEventRecordPageCommand extends ActiveOrSuspendedWorkspa
       return;
     }
 
+    const hasCallRecordingsField = isDefined(
+      flatFieldMetadataMaps.byUniversalIdentifier[
+        CALENDAR_EVENT_CALL_RECORDINGS_FIELD_UNIVERSAL_IDENTIFIER
+      ],
+    );
+
+    const pageLayoutWidgetUniversalIdentifiers = hasCallRecordingsField
+      ? [
+          ...CALENDAR_EVENT_PAGE_LAYOUT_WIDGET_UNIVERSAL_IDENTIFIERS,
+          CALENDAR_EVENT_CALL_RECORDINGS_WIDGET_UNIVERSAL_IDENTIFIER,
+        ]
+      : CALENDAR_EVENT_PAGE_LAYOUT_WIDGET_UNIVERSAL_IDENTIFIERS;
+
     const { allFlatEntityMaps: standardAllFlatEntityMaps } =
       computeTwentyStandardApplicationAllFlatEntityMaps({
         now: new Date().toISOString(),
@@ -169,8 +189,7 @@ export class SyncCalendarEventRecordPageCommand extends ActiveOrSuspendedWorkspa
         standardFlatEntityMaps:
           standardAllFlatEntityMaps.flatPageLayoutWidgetMaps,
         existingFlatEntityMaps: flatPageLayoutWidgetMaps,
-        universalIdentifiers:
-          CALENDAR_EVENT_PAGE_LAYOUT_WIDGET_UNIVERSAL_IDENTIFIERS,
+        universalIdentifiers: pageLayoutWidgetUniversalIdentifiers,
       });
 
     const totalOperationCount =