v5.1.0

Added

• Integration tests with real Amazon API calls
• Type hints throughout the codebase using Literal types for country codes
• .env.template file for easier development setup
• Code style guide for AI assistants (.agent/rules/code-style-guide.md)
• Pre-commit hooks with Ruff integration
• Version consistency check script (scripts/check_version.py)
• Manual release workflow (release.yml) that creates GitHub releases from CHANGELOG
• CI check to ensure CHANGELOG is updated in every PR

Changed

• BREAKING: Minimum Python version raised from 3.7 to 3.9
• Migrated from setup.py to pyproject.toml for project configuration
• Replaced multiple linters (Flake8, isort, Black, Pylint) with Ruff
• Replaced Docker-based development environment with uv package manager
• Consolidated coverage, mypy, and pytest configuration into pyproject.toml
• Renamed test files to use _test.py suffix instead of test_ prefix
• Updated GitHub Actions workflows to use uv instead of Docker
• Improved docstrings across the codebase
• Completely rewritten README with clearer structure and examples
• Updated Read the Docs configuration to v2 format with modern Sphinx versions
• Updated documentation to furo theme

Removed

• setup.py - replaced by pyproject.toml
• .coveragerc - configuration moved to pyproject.toml
• .flake8 - replaced by Ruff configuration in pyproject.toml
• Docker development environment (docker/, docker-compose.yml)
• Legacy shell scripts (scripts/ directory)
• Custom git hooks (.githooks/) - replaced by pre-commit