fix(documents): syncEntityFolderName defense-in-depth + log level

Two follow-ups from code review:
1. The UPDATE in the retry loop now scopes by both id and port_id so
   it matches every other mutation in document-folders.service.ts and
   honours the CLAUDE.md defense-in-depth pattern.
2. The three entity-rename hooks now log at warn level (not error) —
   a missed folder rename is best-effort cosmetic drift, not a paging
   incident. Matches the existing convention used elsewhere in the
   codebase for non-fatal background work.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/services/yachts.service.ts

@@ -165,7 +165,7 @@ export async function updateYacht(
 
   if (data.name !== undefined) {
     await syncEntityFolderName(portId, 'yacht', id, meta.userId).catch((err) => {
-      logger.error({ err, yachtId: id }, 'Failed to sync yacht folder name');
+      logger.warn({ err, yachtId: id }, 'Failed to sync yacht folder name');
     });
   }