CI: extend stale timelines to be contributor-friendly (#13209)

Extends stale automation timelines:

- Issues: 30 days stale → 14 days close (44 total, was 12)
- PRs: 14 days stale → 7 days close (21 total, was 8)

PR #13209

.github/workflows/stale.yml

@@ -23,10 +23,10 @@ jobs:
         uses: actions/stale@v9
         with:
           repo-token: ${{ steps.app-token.outputs.token }}
-          days-before-issue-stale: 7
-          days-before-issue-close: 5
-          days-before-pr-stale: 5
-          days-before-pr-close: 3
+          days-before-issue-stale: 30
+          days-before-issue-close: 14
+          days-before-pr-stale: 14
+          days-before-pr-close: 7
           stale-issue-label: stale
           stale-pr-label: stale
           exempt-issue-labels: enhancement,maintainer,pinned,security,no-stale