Запрос на слияние 'stats' (#5) из stats в master

feat: add StatsController and related DTO/service for language pair statistics retrieval

feat: add StatsController and related DTO/service for language pair statistics retrieval

Запрос на слияние 'history' (#4) из history в master

feat: add endpoints for retrieving and deleting translations, implement corresponding service methods, and handle resource not found exceptions

feat: add endpoints for retrieving and deleting translations, implement corresponding service methods, and handle resource not found exceptions

Запрос на слияние 'real-translation-call' (#3) из real-translation-call в master

feat: implement external translation client and integrate with translation service

feat: implement external translation client and integrate with translation service

Запрос на слияние 'basic-api-endpoint' (#2) из basic-api-endpoint в master

fix: update Javadoc comments in GlobalExceptionHandler to clarify return types

chore: update datasource configuration to use environment variables for username and password

docs: add Javadoc comments to main application, controllers, DTOs, and service classes

feat: implement translation service with controller, DTOs, and validation