Three new tutorial pages:
- Building a REST API: full CRUD with Pydantic validation, from scratch
- Using SQLAlchemy: async engine, lifespan setup, CRUD with ORM
- Migrating from Flask: concept mapping, quick reference table,
gradual migration via app mounting
Also rewritten:
- CLI docs: cleaner, more concise
- API reference: added prose descriptions for each section
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
