Track retry counts by error type (429, 5xx, timeout, connection) and
output API Health Report at end of each test run. Writes api-health.json
for aggregation across all 42 SDKs.
This lets us monitor API reliability over time and identify patterns.
- Add `un languages [--json]` command to list available execution languages
- Add `un image` command with full image management:
- --list, --info, --delete, --lock, --unlock
- --publish, --visibility, --spawn, --clone
- Update CLI_SPEC.md with new command documentation
- All implementations follow consistent patterns