Autonomous Delivery — Scheduled Runs With Nobody Watching

SCHEDULED / UNATTENDED entry point for a delivery run with no human on the line. Audits real state (git is truth, the tracker is a hint), selects work whose dependencies are genuinely satisfied, dispatches the owning pipeline skill, closes out, and reports. Three modes: `story` (1 per run, hard cap), `bug` (up to 3, sequential), `discovery` (backlog definitions only, never writes code). Four phases: Phase 0 Lock -> Phase 1 Audit -> Phase 2 Select -> Phase 3 Execute -> Phase 4 Close and report. Triggers on: scheduled delivery run, unattended run, autonomous run, cron delivery, routine run, nightly delivery, overnight sprint run, run the queue unattended, pick up the next u…