fix: increase operations-per-run to 1000 and pin stale action to v10.2.0

The stale-issues workflow was hitting the default 30 operations limit,
preventing it from processing all 2900+ issues/PRs. Increased to 1000
to handle the full backlog. Also pinned to exact v10.2.0 for reproducibility.

.github/workflows/stale-issues.yml

@@ -15,8 +15,9 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: actions/stale@v10
+      - uses: actions/stale@v10.2.0
         with:
+          operations-per-run: 1000
           days-before-stale: ${{ env.DAYS_BEFORE_STALE }}
           days-before-close: ${{ env.DAYS_BEFORE_CLOSE }}
           stale-issue-label: "stale"