* docs: update CHANGELOG for v1.6.0 release
* fix: improve error logging for chat model configuration issues (#358)
- Add detailed error logging in provision.py when model lookup fails
- Add warning logging in models.py when default model is not configured
- Add traceback logging in chat router exception handler
- Update Ollama docs with model name configuration guidance
- Update troubleshooting docs with "Failed to send message" solutions
- Bump version to 1.6.1
* chore: uvlock
- Replace old docs structure with new comprehensive documentation
- Organize into 8 major sections (0-START-HERE through 7-DEVELOPMENT)
- Convert CONFIGURATION.md, CONTRIBUTING.md, MAINTAINER_GUIDE.md to redirects
- Remove outdated MIGRATION.md and DESIGN_PRINCIPLES.md
- Fix all internal documentation links and cross-references
- Add progressive disclosure paths for different user types
- Include 44 focused guides covering all features
- Update README.md to remove v1.0 breaking changes notice
