Retire idle Cloud sockets after team policy changes

Closed
TE
4h ago
+394-31

Team policy changes left idle Cloud connections using old authority. Policy writes now commit a durable notice with the audit; CloudDO checks current shared or personal authority and closes stale connections.

Hosted checks pass 443 tests, including 18 new cases. The same wire command reproduces four failures before the fix. Live service verification is pending. Builds on #22284.

Changelog

Fixed idle Cloud connections retaining access after team policy changes.