M6 - Actions tooling (runs/jobs/logs + cache)

Phase 7 of the Forgejo extension IMPLEMENTATION_PLAN: read-only Forgejo Actions tooling (v16 baseline) — list/search runs and jobs, download job/run logs with a deterministic cache. TDD, mocked-fetch unit tests, zip dependency, 5 new forgejo_action_* tools.

No due date
100% Completed