test(ios): retry transient simulator input failures

[quanruzhuoxiu]

Summary

• reproduce the current iOS simulator smoke input race with an immutable workflow_dispatch run pinned to the original empty repro commit
• retry only the deterministic Safari input step when WDA source shows the target field did not receive the expected value
• keep the first attempt in typeOnly mode, retry observed value mismatches with idempotent replace mode, and submit only after the expected value is observed
• write each input attempt source XML into diagnostics and update report assertions for the actual number of targeted input attempts
• add unit coverage for first-attempt success, value-mismatch retry, immediate action/source failures, retry exhaustion, missing field handling, and invalid retry configuration

Validation

• pnpm run lint
• pnpm exec nx test @midscene/ios --skip-nx-cache
• AI_TEST_TYPE=iOS MIDSCENE_IOS_SIMULATOR_SMOKE=0 pnpm exec nx test @midscene/ios --skip-nx-cache -- tests/ai/ios-simulator-smoke.test.ts --retry=0
• pnpm exec nx test @midscene/ios --skip-nx-cache -- tests/unit-test/ios-simulator-input-retry.test.ts --retry=0

Remote validation

• Repro run on original empty repro commit: https://github.com/web-infra-dev/midscene/actions/runs/30338397016
• PR iOS Simulator run: https://github.com/web-infra-dev/midscene/actions/runs/30338442554
• 10 fixed-commit iOS Simulator dispatch runs: pending

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