fix: address Bugbot review #3 — mutation invalidation gaps

- Dual-layer cache invalidation on interact mutations
  (dns-hole, media-requests, smart-home, indexer-manager, anchor-notes)
- importOldmarrConfig: invalidate created boards
- createBoard: invalidateUserCache when auto-setting homeBoardId
- group.savePositions: invalidate user caches for affected members
- integration.requestMedia: invalidate integration data cache
- user.delete: invalidate user cache

packages/old-import/src/import/import-single-oldmarr.ts

@@ -39,4 +39,6 @@ export const importSingleOldmarrConfigAsync = async (
       boardInsertCollection.insertAll(db);
     },
   });
+
+  return boardInsertCollection.boards.map(({ id, name }) => ({ id, name }));
 };

packages/old-import/src/index.ts

@@ -9,5 +9,5 @@ export const importOldmarrAsync = async (
   old: OldmarrConfig,
   configuration: OldmarrImportConfiguration,
 ) => {
-  await importSingleOldmarrConfigAsync(db, old, configuration);
+  return await importSingleOldmarrConfigAsync(db, old, configuration);
 };