[Workflow Hardening] Harden PAW workflow control state

[lossyrob]

Closes #299

Summary

Hardens PAW and PAW Review around durable embedded control state so workflow progression, review sequencing, status, and resume paths can rely on explicit artifact state instead of prompt memory alone.

Changes

• embed compact hardened-state contracts for workflow and review artifacts and mirror active required items into TODOs
• gate PAW transitions, review procedures, git/PR entrypoints, and review terminal outcomes on explicit control-state progression
• align VS Code status, handoff, and configuration surfaces with the shared workflow contract without moving CLI behavior into src/
• document hardened-state behavior, legacy best-effort mode, and review terminal-state semantics
• resolve final-review follow-ups around final PR gating, legacy VS Code fallback, PAW Review handoff identifiers, and review-posting idempotency

Testing

• �ash -lc ""./scripts/lint-prompting.sh skills/paw-pr/SKILL.md skills/paw-final-review/SKILL.md skills/paw-planning-docs-review/SKILL.md skills/paw-review-github/SKILL.md skills/paw-status/SKILL.md""

pm run lint

pm run compile

pm test

• cd tests/integration && npx tsx --test tests/skills/control-state-reconciliation-content.test.ts tests/workflows/final-review.test.ts tests/workflows/review-terminal-state-tracking.test.ts

Artifacts

• Last tracked workflow-artifact snapshot: https://github.com/lossyrob/phased-agent-workflow/tree/5df48d9062f233b069b49177848531014bef0ebd/.paw/work/workflow-hardening/

🐾 Generated with PAW