- Rewrite .forgejo/workflows/ci.yml to route all jobs through nox sessions
- Fix coverage_report nox session: serial behave mode replaces broken parallel
mode (22% -> 97% accuracy), raise fail-under from 85% to 97%
- Pass posargs through format nox session for CI --check support
- Add 11 CI workflow validation scenarios (Behave) + Robot smoke test + ASV bench
- Add 108 new Behave scenarios covering 6 largest coverage gaps to reach 97%:
yaml_template_engine, actor/config, actor/registry, message_router,
context_analysis, context_service
- Update docs/development/ci-cd.md with nox-based CI docs and 97% threshold
- Restore implementation_plan.md verbose style, check off completed CI tasks
Verified: 1673 scenarios pass, 97% coverage, lint clean, typecheck clean
