chore(engine): bump submodule 289ef07 -> 26d93c1 (34 commits)
Brings the PO up to the same harness the lichen orchestrator runs. Adds the Tangled tooling — tangled_pr.py (file a pull), tangled_repo.py (create a repo), tangled_pr_edit.py (edit an existing pull's title/body) — plus the watchdog work since v0.1.0: build-aware stall detection, WAITING-UNTIL proof-of-life, [pipeline] stages with push-on-retire, persistent-agent wakes surviving SEQUENCE-COMPLETE, and per-gate token logging. `agents.py status` reads the PO's agents.toml unchanged on the new engine; the PO agent kept its session across the bump, the watchdog was restarted onto the new code. Co-Authored-By: Claude <noreply@anthropic.com>
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