fix(ci): clean stale release drafts before publish

.github/workflows/release.yml

@@ -9,6 +9,10 @@ permissions:
   contents: write
   packages: write
 
+concurrency:
+  group: release-aether-${{ github.ref }}
+  cancel-in-progress: false
+
 env:
   REGISTRY: ghcr.io
   GHCR_IMAGE: fawney19/aether
@@ -236,6 +240,27 @@ jobs:
           name: release-assets
           path: release-assets
 
+      - name: Delete stale draft releases for tag
+        env:
+          GH_TOKEN: ${{ github.token }}
+          RELEASE_TAG: ${{ github.ref_name }}
+          REPOSITORY: ${{ github.repository }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          draft_ids="$(gh api "repos/${REPOSITORY}/releases" --paginate --jq '.[] | select(.tag_name == env.RELEASE_TAG and .draft == true) | .id')"
+
+          if [[ -z "${draft_ids}" ]]; then
+            echo "No stale draft releases for ${RELEASE_TAG}"
+            exit 0
+          fi
+
+          while IFS= read -r release_id; do
+            [[ -z "${release_id}" ]] && continue
+            echo "Deleting stale draft release ${release_id} for ${RELEASE_TAG}"
+            gh api -X DELETE "repos/${REPOSITORY}/releases/${release_id}"
+          done <<< "${draft_ids}"
+
       - name: Publish GitHub Release assets
         uses: softprops/action-gh-release@v2
         with: