- Deleted Mango.Sandbox.SignalRTestClient project and all related files from the solution.
- Switched appsettings.json connection string to use FruitBank_DEV.
- Cleaned up project references in Mango.Sandbox.EndPoints and its test project.
- Commented out all Null* plugin manager/service classes in Mango.Sandbox.EndPoints.Services.
Introduces a new SANDBOX environment with a dedicated web app (`Mango.Sandbox.EndPoints`) for testing SignalR endpoints in isolation from the main application. Adds null plugin manager implementations to avoid plugin dependencies. Includes automated MSTest tests (`Mango.Sandbox.EndPoints.Tests`), a manual SignalR test client, and a PowerShell script for building and running the sandbox. Provides configuration files and health endpoints for robust, independent development and testing of FruitBank SignalR logic.
Loretta