💚 ci: venv 캐시 추가 및 Chrome 드라이버 설치 설정 보강

.github/workflows/lotto-buy.yml

@@ -14,7 +14,17 @@ jobs:
       - name: 체크아웃
         uses: actions/checkout@v4
 
+      - name: venv 캐시
+        id: cache-venv
+        uses: actions/cache@v4
+        with:
+          path: .venv
+          key: venv-${{ runner.os }}-${{ hashFiles('lotto-runner/requirements.txt') }}
+          restore-keys: |
+            venv-${{ runner.os }}-
+
       - name: Python 및 시스템 의존성 설치
+        if: steps.cache-venv.outputs.cache-hit != 'true'
         run: |
           apt-get update
           apt-get install -y \
@@ -67,6 +77,7 @@ jobs:
         uses: browser-actions/setup-chrome@v1
         with:
           install-dependencies: true
+          install-driver: true
 
       - name: Chrome 확인
         run: |