Leverage Pydantic Settings to create a central source of truth for hardcoded values in Honcho. Make it easier to add new settings and modify them during deployment or runtime.

Summary by CodeRabbit

• New Features

  • Centralized configuration management introduced, allowing settings via environment variables, .env, or a config.toml file.
  • Example configuration file (config.toml.example) and an expanded .env.template provided for easier setup and customization.
  • Added new document management endpoints: retrieve, update, and delete documents.
  • Added support for embedding generation through a unified model client abstraction.

• Improvements

  • All configuration (database, authentication, LLM, observability, etc.) is now managed centrally, simplifying deployment and maintenance.
  • Enhanced documentation with detailed setup, configuration, and contribution guides.
  • Dockerfile updated to include configuration files in container builds.
  • Expanded CORS support to include new origins.

• Bug Fixes

  • Database session handling improved for better transaction atomicity and reduced idle time.

• Refactor

  • Replaced hardcoded and environment variable-based settings throughout the codebase with centralized configuration access.
  • Unified embedding and model generation logic under a single client abstraction.
  • Migration scripts and internal logic now consistently use centralized configuration for database schema and connection settings.

• Documentation

  • README, CONTRIBUTING, and CLAUDE documentation expanded and reorganized for clarity and ease of use.
  • Added detailed changelog for the new release.

• Chores

  • Version bumped to 2.0.1.
  • Updated test and CI configuration to match new environment variable naming conventions.