Add unit tests for RabbitMq and Udp transport servers and clients

- Implemented comprehensive unit tests for RabbitMqTransportServer, covering constructor, disposal, connection management, event handlers, and exception handling.
- Added configuration tests for RabbitMqTransportServer to validate SSL, durable queues, auto-recovery, and custom virtual host options.
- Created unit tests for UdpFrameProtocol, including frame parsing and serialization, header size validation, and round-trip data preservation.
- Developed tests for UdpTransportClient, focusing on connection handling, event subscriptions, and exception scenarios.
- Established tests for UdpTransportServer, ensuring proper start/stop behavior, connection state management, and event handling.
- Included tests for UdpTransportOptions to verify default values and modification capabilities.
- Enhanced service registration tests for Udp transport services in the dependency injection container.

src/Gateway/StellaOps.Gateway.WebService/StellaOps.Gateway.WebService.csproj

@@ -6,6 +6,9 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="YamlDotNet" Version="16.2.1" />
+  </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\__Libraries\StellaOps.Router.Common\StellaOps.Router.Common.csproj" />
     <ProjectReference Include="..\..\__Libraries\StellaOps.Router.Config\StellaOps.Router.Config.csproj" />