ci: run independent workflow steps in parallel (#1788)

.github/workflows/pr-title.yml

@@ -0,0 +1,42 @@
+name: 📝 PR Title
+
+on:
+  pull_request:
+    types: [opened, edited, synchronize, reopened]
+    branches: [develop, master]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  validate_pr_title:
+    name: "📝 Validate PR Title"
+    runs-on: ubuntu-26.04
+    steps:
+      - uses: amannn/action-semantic-pull-request@48f256284bd46cdaab1048c3721360e808335d50 # v6.1.1
+        id: lint_pr_title
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      # Fork PRs only get a read-only GITHUB_TOKEN here, so the sticky comment
+      # is posted from the privileged pr-title-comment.yml (workflow_run). Hand
+      # off the result (PR number + lint error) as an artifact for it to read.
+      - if: always()
+        env:
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          LINT_ERROR: ${{ steps.lint_pr_title.outputs.error_message }}
+        run: |
+          mkdir -p pr-title-result
+          printf '%s' "$PR_NUMBER" > pr-title-result/number
+          printf '%s' "$LINT_ERROR" > pr-title-result/error
+
+      - if: always()
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: pr-title-result
+          path: pr-title-result/
+          retention-days: 1