test(detector): add unit tests for model and drawing modules

refactor(detector): split logic into separate modules

style(ci): add flake8 configuration and fix lint issues

test(api): add pytest tests for FastAPI endpoints

Запрос на слияние 'feature/fastapi-refactor' (#2) из feature/fastapi-refactor в main

feat(validation): add input validation for request data

feat(config): move model configuration to separate module

feat(validation): add input validation for request data

feat(config): move model configuration to separate module