Add applicationId to syncableEntity and fix syncApp deletion (#15170)

## Context
- All flatEntity should extend SyncableEntity
- SyncableEntity should now have applicationId and application relation
- Fix syncApp deletion, should now properly use migration v2 to delete
syncable entities

packages/twenty-server/src/engine/metadata-modules/view/dtos/inputs/create-view.input.ts

@@ -1,4 +1,4 @@
-import { Field, InputType } from '@nestjs/graphql';
+import { Field, HideField, InputType } from '@nestjs/graphql';
 
 import {
   IsBoolean,
@@ -90,4 +90,10 @@ export class CreateViewInput {
   @IsUUID()
   @Field(() => UUIDScalarType, { nullable: true })
   calendarFieldMetadataId?: string;
+
+  @HideField()
+  universalIdentifier?: string;
+
+  @HideField()
+  applicationId?: string;
 }