- Updated `appsettings.Development.json` to change the database connection string for the storage service.
- Added `Microsoft.EntityFrameworkCore.Design` package reference to the project file for design-time features.
- Removed obsolete command and handler files related to sample management, including `ChangeSampleStatusCommand`, `CreateSampleCommand`, `UpdateSampleCommand`, and their respective handlers.
- Cleaned up the `SamplesController` and related query and validation files to streamline the codebase.
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