Address @kausmeows's PR review of agnoctl:

- agno connect flags a rotated token (rotated: true) and prints a reminder to
  restart the affected coding agent, which keeps using the previous (now
  revoked) token in its live MCP connection until it reconnects.
- Autodiscovery probes 7778 and 7779 in addition to 7777 and 8000, so an
  AgentOS on a bumped port (7777 taken) is found instead of silently missed;
  any other port still needs --url / AGENTOS_URL, which the not-found error names.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>