Add public curator notes and U-shaped hall wall hang.

Paintings get editable curator notes with brass plates in the 3D hall, and visit order now uses the far/end wall between left and right.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/migrate.js

@@ -16,6 +16,7 @@ const INCREMENTAL_MIGRATIONS = [
   'migrate-sync-timestamps.sql',
   'migrate-i18n.sql',
   'migrate-tours.sql',
+  'migrate-curator-notes.sql',
 ];
 
 async function bootstrapCurator() {