feat/redis_db

[JarbasAl]

allow several database backends

Summary by CodeRabbit

• New Features

  • Introduced support for JSON and Redis database backends for client operations.

• Bug Fixes

  • Improved error handling to provide more informative messages during database operations.

• Refactor

  • Streamlined client-related methods to utilize a database instance for operations.

• Tests

  • Expanded test coverage to include scenarios like updating entries, searching for nonexistent entries, and deleting/reusing client IDs.