Debug coverage (#1864)

* Debug coverage

* Extract all artifacts

.github/workflows/coverage.yaml

@@ -16,6 +16,7 @@ jobs:
     - name: Parse artifacts
       id: parse_artifacts
       run: |
+        unzip *.zip
         echo "pr_number=$(<pr_number.txt)" >> "$GITHUB_OUTPUT"
         echo "commit_sha=$(<commit_sha.txt)" >> "$GITHUB_OUTPUT"
     - name: Clone repo