chore(ci): PR 오픈/동기화 시 'automerge' 라벨 자동 부여 워크플로 추가

.gitea/workflows/auto-label.yml

@@ -0,0 +1,28 @@
+name: Auto Label PR
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  add-automerge-label:
+    runs-on: [macos, host]
+    steps:
+      - name: Add 'automerge' label to PR
+        env:
+          CI_TOKEN: ${{ secrets.CI_TOKEN }}
+          GITEA_BASE_URL: https://gitea.jaybe.dev
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          REPO: ${{ github.repository }}
+        run: |
+          set -euo pipefail
+          if [ -z "${CI_TOKEN:-}" ]; then
+            echo "CI_TOKEN not set; skipping labeling"; exit 0; fi
+          OWNER=$(echo "$REPO" | cut -d'/' -f1)
+          NAME=$(echo "$REPO" | cut -d'/' -f2)
+          echo "Labeling PR #$PR_NUMBER on $OWNER/$NAME with 'automerge'"
+          curl -sS -X POST \
+            -H "Content-Type: application/json" \
+            -H "Authorization: token ${CI_TOKEN}" \
+            "${GITEA_BASE_URL}/api/v1/repos/${OWNER}/${NAME}/issues/${PR_NUMBER}/labels" \
+            -d '["automerge"]' || true