Add issue_is_dev_claimable() helper to lib/issue-lifecycle.sh that checks
whether an issue's labels are compatible with dev-agent ownership. Labels
like bug-report, vision, in-triage, prediction/*, action, and formula
indicate another agent owns the issue.
In dev-poll.sh, replace the vision-only skip with the new helper so that
ALL non-dev labels are excluded from stale detection. This prevents
dev-poll from relabeling bug-reports (or other agent-owned issues) as
blocked while they are being triaged.
Also removes the now-redundant formula/prediction guard block in the
orphan section, since issue_is_dev_claimable covers those labels.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
a0da97113b