v1.0.4: Limit query results and delete duplicate records

Added setMaxResults(1) to query limiting results to improve performance and implemented deleteDuplicates method to remove duplicate currency exchange rate records. This ensures data integrity and reduces redundant records in the database.

v1.0.3

Update error messages in DailyExchangeRateRepository.

v1.0.2

Refactor currency rate checks and enhance error messages

Moved the currency rate availability check into a dedicated `has` method for greater readability and code reuse. Improved error messaging to include the currency code, aiding in debugging and log inspection.

v1.0.1

Update README.md

v1.0.0

Update composer dependencies

Replace "bigoen/carbon-bundle" with "nesbot/carbon" in composer.json. This change ensures compatibility with the latest PHP and Symfony versions while maintaining the necessary functionality.