fix(ios): recover simulator recorder startup failures

[PLASMA-FR]

Summary

Closes #2170.

Recover iOS Simulator recording startup without leaving CoreSimulator's host-wide recording slot stuck. Unpublished recorder rollback now sends SIGINT, waits a bounded five seconds for graceful detach, and escalates only if the process remains alive. A native simctl recordVideo exit 16 is returned as non-retriable DEVICE_IN_USE with details.reason: apple_simulator_recording_busy and actionable recovery guidance; other exits retain their existing classification.

Startup now observes exits that settle before PID discovery or on the final process-identity poll. The provider scenario proves a failed start adopts no recorder and a later start/stop succeeds. Five files, +195/−26.

Validation

Tested 06e98c7e6a7bf0517c31339fb2a4814ae055d9cc with Node 24.13.1 and pnpm 11.17.0.

• The focused regressions failed before the fix; 19 simulator-host tests and the provider contention/recovery scenario pass.
• AGENT_DEVICE_VITEST_MAX_WORKERS=1 pnpm check:affected --run passes: 301 files / 2,144 tests, 12 command-doc tests, format, lint, types, layering, Fallow, and build.
• GitHub Coverage, Integration, and every platform smoke job pass on this head. This Linux host cannot run CoreSimulator, and ordinary iOS smoke does not poison/recover the host recording slot; that native contention scenario remains a disclosed review risk.

[thymikee]

No code findings at 06e98c7. The tests cover error classification, graceful rollback and failed-start cleanup through the daemon. Before this is ready, please add a macOS/CoreSimulator run that observes real recording contention and confirms a subsequent recording starts and stops after the SIGINT rollback; the injected exit-16 process and ordinary iOS smoke do not prove the host recording slot is released.