Deleted an unnecessary `using` directive and a debug `Console.WriteLine` call. These changes clean up the code, improve readability, and avoid potential clutter.
Replaced the CleanupHostedService with CleanupRecurringTask for better scheduling and simpler configuration. Converted several classes to use constructor-based dependency injection and streamlined some type assignments. Removed unneeded files and updated existing code to follow more concise conventions. This enhances maintainability and readability.
