Fix stale workflow to never close issues and ignore dependabot PRs (#3717)

* Initial plan for issue

* Update stale workflow to fix issues with dependabot PRs and issue closing

Co-authored-by: rbtr <[email protected]>

* Fix stale workflow to properly disable issue closing while keeping PR closing

Co-authored-by: rbtr <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: rbtr <[email protected]>

Author: Copilot

.github/workflows/stale.yaml

@@ -16,14 +16,15 @@ jobs:
         id: stale
         with:
           ascending: true
-          close-issue-message: 'Issue closed due to inactivity.'
           close-pr-message: 'Pull request closed due to inactivity.'
-          days-before-close: 7
           days-before-stale: 14
+          days-before-issue-close: -1
+          days-before-pr-close: 7
           delete-branch: true
           exempt-issue-labels: 'exempt-stale'
+          exempt-pr-labels: 'exempt-stale,dependencies,ci'
           operations-per-run: 100
-          stale-issue-message: 'This issue is stale because it has been open for 2 weeks with no activity. Remove stale label or comment or this will be closed in 7 days'
+          stale-issue-message: 'This issue is stale because it has been open for 2 weeks with no activity. Remove stale label or comment to keep it open.'
           stale-pr-message: 'This pull request is stale because it has been open for 2 weeks with no activity. Remove stale label or comment or this will be closed in 7 days'
       - name: Print outputs
         run: echo ${{ join(steps.stale.outputs.*, ',') }}