Address review feedback - when --json mode is used, the drift warning
was completely suppressed. Now it's included in the warnings array
of the DaemonActionResponse so programmatic consumers can surface it.
When the gateway token in config differs from the token embedded in the
service plist/unit file, restart will not apply the new token. This can
cause silent auth failures after OAuth token switches.
Changes:
- Add checkTokenDrift() to service-audit.ts
- Call it in runServiceRestart() before restarting
- Warn user with suggestion to run 'openclaw gateway install --force'
Closes#18018
