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/flat-view/types/flat-view.type.ts

@@ -1,4 +1,5 @@
 import { type Workspace } from 'src/engine/core-modules/workspace/workspace.entity';
+import { type FlatEntityFrom } from 'src/engine/metadata-modules/flat-entity/types/flat-entity.type';
 import { type ObjectMetadataEntity } from 'src/engine/metadata-modules/object-metadata/object-metadata.entity';
 import { type ViewFieldEntity } from 'src/engine/metadata-modules/view-field/entities/view-field.entity';
 import { type ViewFilterGroupEntity } from 'src/engine/metadata-modules/view-filter-group/entities/view-filter-group.entity';
@@ -20,8 +21,10 @@ export type ViewEntityRelationProperties =
     | Workspace
   >;
 
-export type FlatView = Omit<ViewEntity, ViewEntityRelationProperties> & {
-  universalIdentifier: string;
+export type FlatView = FlatEntityFrom<
+  ViewEntity,
+  ViewEntityRelationProperties
+> & {
   viewFieldIds: string[];
   viewFilterIds: string[];
   viewGroupIds: string[];

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

@@ -20,9 +20,10 @@ export const fromCreateViewInputToFlatViewToCreate = ({
     );
 
   const createdAt = new Date();
+  const viewId = createViewInput.id ?? v4();
 
   return {
-    id: createViewInput.id ?? v4(),
+    id: viewId,
     objectMetadataId,
     workspaceId,
     name: createViewInput.name,
@@ -42,9 +43,10 @@ export const fromCreateViewInputToFlatViewToCreate = ({
     openRecordIn: createViewInput.openRecordIn ?? ViewOpenRecordIn.SIDE_PANEL,
     position: createViewInput.position ?? 0,
     type: createViewInput.type ?? ViewType.TABLE,
-    universalIdentifier: v4(),
+    universalIdentifier: createViewInput.universalIdentifier ?? viewId,
     viewFieldIds: [],
     viewFilterIds: [],
     viewGroupIds: [],
+    applicationId: createViewInput.applicationId ?? null,
   };
 };