fix: restore OMP secondmates after successful generations

[dnth]

Intent

Fix Boat F1: wake-on-delivery restore refuses a remote OMP secondmate that ran >=1 turn. In bin/fm-spawn.sh secondmate branch, OMP_SECONDMATE_RELAUNCH=1 is set when the recorded endpoint is dead/missing, but the unconditional artifact guard refused when prior-generation .omp-ext.ts/.omp-ready/.omp-started markers exist. Those markers are the prior incarnation's own runtime artifacts, not worker leftovers. When OMP_SECONDMATE_RELAUNCH=1, retire the prior generation's .omp-* artifacts via the existing spawn_omp_secondmate_abort_retire_generation (or equivalent) instead of refusing, keeping the same live-owner checks.

Acceptance criteria:

• AC1: e2e fixture proves successful-generation -> compute sleep -> wake-on-delivery restore succeeds (the gap PR 200 tests missed).
• AC2: live-owner checks preserved: a genuinely live prior owner still refuses rather than clobbering.
• AC3: full suite green; bin/fm-lint.sh clean. Accepted form: broad full-suite regression is owned by the PR's GitHub CI (ci.yml owns broad regression); local evidence is bin/fm-lint.sh clean plus the changed-path tests green; a red GitHub CI blocks PR-ready.

Firstmate-Validation-Generation: 628efbb1c79765e286efabc44f0aef71

What Changed

• Retire prior OMP secondmate runtime markers when relaunching a dead or missing endpoint, allowing wake-on-delivery restore after a successful generation.
• Preserve live-owner checks and reject unsafe artifact paths before cleanup.
• Document relaunch cleanup and add local and remote regression coverage for restore, live-owner refusal, and exactly-once delivery.

Risk Assessment

✅ Low: Captain, the change narrowly fixes prior-generation artifact retirement while preserving live-owner refusals and adding behavioral restore coverage.

Testing

The Test agent exceeded its invocation budget before live validation completed; no evidence was gathered for this head.

• Outcome: ⚠️ 1 warning across 1 run (30m1s)

Pipeline

Updates from git push no-mistakes

✅ **intent** - passed

✅ No issues found.

✅ **Rebase** - passed

✅ No issues found.

✅ **Review** - passed

✅ No issues found.

⚠️ **Test** - 1 warning

• ⚠️ The Test agent did not finish within its invocation budget. Reported: agent run tests timed out after 30m0s: agent last produced output 52s ago (110 observed); agent reported: codex exited: context deadline exceeded: 2026-10-05T06:50:11.374838Z ERROR codex_core::tools::router: error=exec_command failed: CreateProcess { message: "Rejected(&fix: complete remote retirement with foreign pending replies #34;`/usr/bin/zsh -lc \&fix: complete remote retirement with foreign pending replies #34;rm -rf -- .test-disposable; git status --short; python3 - <<'PY'\nfrom pathlib import Path\np=Path('~/.no-mistakes/evidence/01M45BF96NPNGRTFSXCXZDFJWT/live-restore-summary.log')\ns=p.read_text().split.... This is a budget or provider-slowness cut, not a code failure. Re-running the same request costs another full budget, so no further attempt is made automatically. If this repository's targeted tests or evidence gathering routinely approach the default 30m0s, raise test_agent_timeout in global config. Respond with fix to spend another budget: a repair turn runs only for selected findings other than this budget cut, then validation re-runs. Or abort and retry after raising the budget.

✅ **Document** - passed

✅ No issues found.

✅ **Lint** - passed

✅ No issues found.

✅ **Push** - passed

✅ No issues found.