chore: restore large files before ci coverage checks

A CI checkout omits every file over 50 MB, so verify and generate_pack
resolve those database entries against a disk that does not hold them and
report them missing. The generated README then stops matching the
committed one for a reason that has nothing to do with staleness.

restore_large_files.py writes them back from the release cache, matched by
SHA1 rather than by name, and only where the path is gitignored and
absent. The site workflow runs it, and refreshes the data directories, before
generating.

.github/workflows/deploy-site.yml

@@ -52,6 +52,20 @@ jobs:
       - name: Validate data contracts
         run: python scripts/validate_schemas.py
 
+      # Coverage is resolved against the disk, so a checkout without the
+      # release assets and the data caches reports files as missing and the
+      # generated README stops matching the committed one.
+      - name: Restore large files from release
+        run: |
+          mkdir -p .cache/large
+          gh release download large-files -D .cache/large/ 2>/dev/null || true
+          python scripts/restore_large_files.py
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Refresh data directories
+        run: python scripts/refresh_data_dirs.py
+
       - name: Generate site
         run: |
           python scripts/generate_site.py