This PR changes the default value of `WORKFLOW_LOG_CLEANUP_ENABLED` from `true` to `false` across all configuration files.
## Motivation
Setting the default to `false` provides safer default behavior by:
- Preventing unintended data loss for new installations
- Giving users explicit control over when to enable log cleanup
- Following the opt-in principle for data deletion features
Users who need automatic cleanup can enable it by setting `WORKFLOW_LOG_CLEANUP_ENABLED=true` in their configuration.
fe6538b08d