feat(ci): pass HF_TOKEN to weekly stats and add issues:write permission

- HF_TOKEN enables fetching download counts for gated HuggingFace repos
- GITHUB_REPOSITORY lets update_stats.py open an issue when broken URLs
  are detected
- issues:write and pull-requests:write added to workflow permissions

Author: jih0-kim

.github/workflows/weekly-update.yml

@@ -8,6 +8,8 @@ on:
 
 permissions:
   contents: write
+  pull-requests: write
+  issues: write
 
 jobs:
   update:
@@ -28,19 +30,30 @@ jobs:
       - name: Fetch latest stats (GitHub + HuggingFace)
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          HF_TOKEN: ${{ secrets.HF_TOKEN }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
         run: python scripts/update_stats.py
 
       - name: Regenerate README and dashboard data
         run: python scripts/generate_site.py
 
-      - name: Commit and push changes
+      - name: Commit and open PR
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           git config user.name  "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
           git add data/models.yaml data/datasets.yaml data/tools.yaml docs/data.json README.md
           if git diff --staged --quiet; then
             echo "No changes to commit."
-          else
-            git commit -m "chore: weekly stats update $(date +'%Y-%m-%d')"
-            git push
+            exit 0
           fi
+          BRANCH="chore/weekly-stats-$(date +'%Y-%m-%d')"
+          git checkout -b "$BRANCH"
+          git commit -m "chore: weekly stats update $(date +'%Y-%m-%d')"
+          git push origin "$BRANCH"
+          gh pr create \
+            --title "chore: weekly stats update $(date +'%Y-%m-%d')" \
+            --body "Automated weekly GitHub stars / HuggingFace downloads update." \
+            --head "$BRANCH" \
+            --base main