* fix(agents): handle LiveSessionModelSwitchError in subagent execution
Add retry loop for cross-provider model switches in the subagent
command path, mirroring the existing logic in agent-runner-execution.ts.
- Wrap runWithModelFallback in a while(true) loop inside agentCommandInternal
- Catch LiveSessionModelSwitchError and update provider, model,
fallbackProvider, fallbackModel, providerForAuthProfileValidation,
sessionEntry.authProfileOverride, and storedModelOverride before retrying
- Guard storedModelOverride update: only set when the model genuinely
changed (compared before mutation) or a session override already existed
- Reset lifecycleEnded flag so the retried iteration can emit lifecycle events
- Add comprehensive tests covering retry success, error propagation,
lifecycle reset, auth-profile forwarding, and fallback override state
Fixes#57998
* fix(agents): include provider change in storedModelOverride guard
* fix(agents): validate allowlist and clear stale compaction count on live model switch
* fix(agents): remove broken allowlist guard on live model switch
* fix(agents): address security review — bound retry loop, validate allowlist, redact error in lifecycle events
* fix(agents): restore error observability in lifecycle events using err.message
* fix(agents): sanitize log inputs and shallow-copy sessionEntry on live model switch
* fix(agents): enforce allowlist on empty set and sanitize error message
* fix: handle subagent live model switches (#58178) (thanks @openperf)
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Co-authored-by: Ayaan Zaidi <hi@obviy.us>
