Add `pr review <n>` with the three action switches --approve,
--request-changes, and --comment, plus --body/--body-file. Exactly one
action flag is required; zero or multiple raise VALIDATION_ERROR before
any API call, mirroring the merge shorthand-conflict rule. Body
requirements are left to Gitea: a body-less event it rejects surfaces its
422 as VALIDATION_ERROR carrying the server's message. Output is
`review: { number, action }`.
- CONVENTIONAL-COMMITS.md: vendored spec (v1.0.0); CLAUDE.md requires
agent-written commits to follow it
- tasks 0002-0020: remaining task breakdown of the gitea-axi spec
(0019 reframed around the three-tier test taxonomy: unit,
integration, end-to-end)
- spec, CONTEXT.md, and ADRs 0006/0007/0011: pending design
refinements from the planning sessions
