API 계약 CI 추가

.github/workflows/api-contract.yml

@@ -0,0 +1,58 @@
+name: API contract
+
+on:
+  pull_request:
+    paths:
+      - "apps/api/**"
+      - "apps/web/src/lib/api.gen.ts"
+      - "apps/web/scripts/generate-api-types.mjs"
+      - "apps/web/package.json"
+      - "apps/web/package-lock.json"
+      - ".github/workflows/api-contract.yml"
+  push:
+    branches:
+      - master
+    paths:
+      - "apps/api/**"
+      - "apps/web/src/lib/api.gen.ts"
+      - "apps/web/scripts/generate-api-types.mjs"
+      - "apps/web/package.json"
+      - "apps/web/package-lock.json"
+      - ".github/workflows/api-contract.yml"
+
+permissions:
+  contents: read
+
+jobs:
+  api-types:
+    name: OpenAPI type drift
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install API dependencies
+        working-directory: apps/api
+        run: python -m pip install -r requirements.txt
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: npm
+          cache-dependency-path: apps/web/package-lock.json
+
+      - name: Install web dependencies
+        working-directory: apps/web
+        run: npm ci
+
+      - name: Check generated API types
+        working-directory: apps/web
+        run: npm run check:api-types