release: back-merge main into staging

Release summary:
- Version: 0.6.39
- Tag: 0.6.39
- Source: main
- Target: staging
- Promoted commits: 2
- Package: @treeseed/cli

Notable changes:
- release: 0.6.39 (e3088a7)
- chore(cli): bump version and update @treeseed/sdk (60a1e8b)

See CHANGELOG.md for the release history entry.

Author: adrianwebb