[elezar]

Summary

Replace the stale issue workflow's state and roadmap exemptions with explicit lifecycle:frozen and state:frozen exemptions. Inactive issues can become stale regardless of their triage, acceptance, agent workflow, or roadmap labels unless a maintainer freezes them.

Related Issue

No issue required: small workflow maintenance change; the maintainer explicitly requested a PR without a separate issue.

Changes

• Replace the eight exempt issue labels with lifecycle:frozen,state:frozen so either naming convention works while the final name is decided.
• Document the exemption and existing stale behavior in CONTRIBUTING.md.
• Retain state:stale as the marker, 14 days before stale marking, another 14 days before issue closure, and disabled PR closure.

Kubernetes uses lifecycle/frozen; the proposed labels retain OpenShell's colon-separated convention. The 14 October snapshot found 96 inactive issues protected by the previous exemption list. Those become eligible unless explicitly frozen.

Testing

• mise run pre-commit passes.
• Parsed workflow YAML and verified both frozen exemptions, stale markers, and unchanged timers.
• git diff --check passes.
• Unit and E2E tests are not applicable to this workflow configuration and contributor guidance change.

Checklist

• Follows Conventional Commits.
• Commit is signed off for DCO compliance.