feat: add Stat-Check ELO column with daily auto-refresh

- Scraper (statcheck-elo-scraper/refresh_elo.py) downloads the stat-check
  ELO workbook from OneDrive and builds public/elo-data.json
- GitHub Actions workflow (.github/workflows/refresh-elo.yml) runs daily
  at 06:00 UTC and commits updated ELO data
- Frontend fetches elo-data.json and matches players by name, using BCP
  career event history to disambiguate same-name candidates
- ELO score shown in new sortable Stat-Check ELO column, visible on all
  screen sizes; unmatched players show —

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/refresh-elo.yml

@@ -0,0 +1,31 @@
+name: Refresh ELO Data
+
+on:
+  schedule:
+    - cron: '0 6 * * *'   # 06:00 UTC daily
+  workflow_dispatch:        # allow manual runs from the Actions tab
+
+jobs:
+  refresh:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Download ELO workbook and build JSON
+        working-directory: statcheck-elo-scraper
+        run: python refresh_elo.py
+
+      - name: Commit updated data if changed
+        run: |
+          git config user.name  "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add public/elo-data.json
+          git diff --cached --quiet || git commit -m "data: refresh stat-check ELO rankings [skip ci]"
+          git push