- Updated `ARCHITECTURE.md` with thorough explanations of OAuth Consumer and Provider modes, supported flows, security features, and endpoints.
- Enhanced `.env.template` with environment variables for OAuth Provider mode setup.
- Expanded `README.md` to highlight OAuth Provider mode capabilities and MCP integration features.
- Added OAuth configuration section to `AGENTS.md`, including key settings for both social login and provider mode.
- Created `ARCHITECTURE.md` with an extensive overview of backend design, principles, and project structure.
- Documented key architectural layers: API, dependencies, services, CRUD, and data layers.
- Included comprehensive guidelines for database architecture, authentication/authorization, error handling, and testing strategy.
- Provided examples for each layer, security practices, and performance considerations.
- Aimed at improving developer onboarding and ensuring consistent implementation practices.
