Add detailed verbose logging to stepsExecTUI for batch changes execution.
When -v flag is passed, users now see logs for:
- Archive download start/completion/failure
- Workspace initialization
- Step caching (skipped steps)
- Step preparation and execution
- Step completion with diff size and file change counts
- Step failures with exit codes

Add verbose logging to TUI for batch changes pre-execution steps:
- Namespace resolution: show resolved namespace ID
- Container images: log successful preparation
- Workspace resolution: show workspace/repo counts and unsupported/ignored counts
- Cache check: show cached specs and tasks to execute