- Unify encoding/collation variables
- Improve connection logic for mysql_db module
- Switch to PyMySQL install path to avoid mysqlclient build failures
- Update healthcheck to container-friendly CMD-SHELL usage
- Normalize network and port configuration
These changes were applied during CI/CD pipeline debugging. The root CI/CD connectivity issue is still not fixed.
Reference: https://chatgpt.com/share/6931adf0-ce7c-800f-86f3-f867fbd3191f