v1.24.0: durable orchestration contracts

[professorpalmer]

Summary

• add immutable completion, attempt, cancellation, effect, and process-cleanup contracts
• add bounded scoped metadata projections with stable cursors and JobRef ownership
• expose origin/project/session identity and process outcomes across Python, CLI/MCP, and TypeScript
• repair SQLite v5 migration triggers, queued cancellation fairness, and POSIX/Windows descendant cleanup

Validation

• python -m unittest discover -s tests: 2913 passed, 33 skipped
• Python 3.9/current focused contract matrices green
• wheel and sdist build; twine check green
• clean installed-wheel canary launched codex/gpt-6-astra at medium reasoning, fixed a real failing test, emitted patch/report, and produced delivered receipts plus scoped metadata projection

Upgrade note

Restart long-lived supervisors, workers, MCP servers, and dashboards before/after upgrading. SQLite v5 is migrated and stale triggers are repaired by the new supervisor; old and new writers are not hot-compatible.

[kbentonferguson]

Sheesh!