GENGARVIS-013 deterministic iTerm proof session targeting

[iocfinc]

Automated fix for #13. See commit ba3bd7c on branch codex/GENGARVIS-013-iterm-session-targeting.\n\nValidation:\n- npm run test:ci -- tests/itermSessionTargeting.test.ts\n- npm run test:ci -- tests/agentScaffold.test.ts\n- npm run lint\n\nVisual QA: skipped in this runtime because iTerm app is unavailable (Application can't be found. (-2700)).

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PR review automation completed.

• Use agent/skills/analyze_pr.md for the review structure.
• Confirm architecture impact is acceptable.
• Confirm tests cover changed behavior.
• When shared toolkit behavior changes, verify sibling-toolkit consistency was checked or explicitly ruled out.
• Verify CHANGELOG.md is updated when required.
• For frontend-affecting work, confirm screenshot artifacts or an explicit skip reason are included in the PR notes, with Chrome DevTools MCP preferred when configured.
• Confirm the linked issue was updated or a post-ready draft was prepared when live posting was deferred.