Summary

• refresh the launchd plist before kickstarting a restart
• let hermes update --gateway recover a gateway whose launchd job unloaded itself during update
• add regression tests for both launchd restart refresh and unloaded-job recovery

Testing

• pytest -o addopts='' tests/hermes_cli/test_update_gateway_restart.py -k "launchd_restart_calls_refresh or gateway_mode_recovers_unloaded_launchd_service or update_detects_launchd_and_skips_manual_restart_message or update_without_launchd_shows_manual_restart"