fix(stale): never auto-close — label only (days-before-close: -1)

This universe never closes/dismisses/deletes an issue or PR — every
request is preserved and evolved. Set the stale close window to -1 so the
workflow labels but never closes; the 60-day informational `stale` label
is unchanged.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 4444J99

.github/workflows/stale.yml

@@ -15,7 +15,7 @@ jobs:
           stale-issue-message: 'Marked stale due to inactivity. Will close in 14 days.'
           stale-pr-message: 'Marked stale due to inactivity. Will close in 14 days.'
           days-before-stale: 60
-          days-before-close: 14
+          days-before-close: -1
           exempt-issue-labels: 'pinned,evergreen,omega,blocked'
           exempt-pr-labels: 'pinned,evergreen,work-in-progress'
           stale-issue-label: 'stale'