This folder contains extra documentation for the project: architecture, API contracts, testing, typing, configuration, and deployment.

• Project Structure — feature-based layout and how to add modules
• API — endpoints, response envelope, request IDs, CORS
• Testing Guide — pytest layout and assertion patterns
• Configuration — env vars, Ruff, mypy, pyright, uv, scripts
• Typing — mypy vs pyright, tightening, CI commands
• Deployment — containers, platforms, health probes