S6-01 — E2E kill/resume closeout

Status: Ready Goal: Prove the Phase 6 exit criteria end to end and publish the downstream handoff.

Acceptance criteria

• Clean-completion, retry-recovery, kill/resume, and HITL-resume integrations pass.
• Phase 6.5 contract test imports VulnRemediationSut, not graph internals.
• Roadmap and docs links resolve to the Phase 6 package.

TDD plan

Red: failing integration fixtures and docs assertions. Green: finish workflow wiring. Refactor: close duplicated fixture setup.