Set retention and if-no-files-found

Author: mbg

.github/workflows/pr-checks.yml

@@ -57,6 +57,8 @@ jobs:
         with:
           name: bundle-metadata-${{ matrix.os }}-${{ matrix.node-version }}
           path: meta.json
+          retention-days: ${{ (github.ref_name == github.event.repository.default_branch && 90) || 7 }}
+          if-no-files-found: error
 
       - name: Run unit tests
         if: always()