fix(playwright): resolve browser dependencies without sudo & cleanup unused files

- Copy necessary shared libraries (libnss, libasound, libsoftokn, etc.) from docker to libs/ to support headless chromium execution on host
- Update server and crawler configuration to support custom DB_PORT (3307)
- Remove unused databases, lockfiles, standalone helper scripts, and documentation files as requested

crawler_service.py

@@ -21,6 +21,7 @@ def get_db_connection():
     """MySQL 데이터베이스 연결을 반환 (환경변수 기반)"""
     return pymysql.connect(
         host=os.getenv('DB_HOST', 'localhost'),
+        port=int(os.getenv('DB_PORT', 3306)),
         user=os.getenv('DB_USER', 'root'),
         password=os.getenv('DB_PASSWORD', '45278434'),
         database=os.getenv('DB_NAME', 'PM_proto'),