Implements the `uwf step read` command to render a single step's turns
as human-readable markdown with quota enforcement.
Changes:
- Implement cmdStepRead() in step.ts with quota enforcement
- Renders step metadata (hash, role, agent)
- Loads and formats turns from detail node
- Enforces quota by selecting most recent turns
- Always shows at least one turn even if it exceeds quota
- Gracefully handles steps with no detail or no turns
- Register `step read` command in cli.ts with --quota flag (default 4000)
- Add comprehensive test suite in step-read.test.ts (6 tests covering
basic functionality, quota enforcement, edge cases, and special chars)
- Update README.md CLI Reference table to include `step read`
- Update package-level README.md with command documentation and example
Closes#484
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
xiaoju