chore(ci): add enforce checklist ci (#1926)

Co-authored-by: Copilot <[email protected]>

Author: soneda-yuya

.github/pull_request_template.md

@@ -9,3 +9,9 @@
 ## Which point I want you to review particularly
 
 ## Memo
+
+## Checklist
+
+- [ ] Verified backward compatibility related to feature modifications (if not compatible, reported deployment notes to the next release owner).
+- [ ] Confirmed backward compatibility for migrations.
+- [ ] Verified that no personally identifiable information (PII) is included in any values that may be displayed.

.github/workflows/enforce_checklist.yml

@@ -0,0 +1,27 @@
+name: Verify Checklist Completion
+
+on:
+  pull_request:
+    types: [opened, edited, synchronize]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get PR body
+        id: pr
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const body = context.payload.pull_request.body || "";
+            core.setOutput("body", body);
+
+      - name: Validate checklist
+        env:
+          BODY: ${{ steps.pr.outputs.body }}
+        run: |
+          if echo "$BODY" | grep -q '\- \[ \]'; then
+            echo "❌ There are unchecked items in the checklist on this PR."
+            exit 1
+          fi
+          echo "✅ All checklist items are checked on this PR."