v2.4.0: add /akiship one-command full release

Added

• New /akiship command runs the full daily release ritual in one shot — leftover triage, doc sync, lint, CHANGELOG, commit, and version — instead of a hand-typed checklist.
• New autonomy contract lets an unattended release run stop only for genuinely undecidable cases (history ambiguity, unclassifiable mid-edit work, or a design conflict) instead of stalling on routine confirmations.

Changed

• The pre-ship gate now also triages leftover/unfinished work first and sweeps only the files actually changed for lint and dead-code issues, keeping full-repo sweeps as a separate on-demand audit.

Full Changelog: 2.3.2...2.4.0