Odinn Maintainer v0.4.0
Guarded Odinn Maintainer automation:
- separate OAuth/read-only planning and deterministic write jobs
- bounded decision-label reconciliation
- authorized close and exact-head protected squash merge
- docs/tests-only repair branches, commits, and pull requests
- global kill switch and per-capability controls, all default-off in the action
- 21 regression tests covering credential separation, stale state, authorization, protection checks, and branch collision handling