Add unit tests and logging infrastructure for InMemory and RabbitMQ transports

- Implemented RecordingLogger and RecordingLoggerFactory for capturing log entries in tests.
- Added unit tests for InMemoryChannel, covering constructor behavior, property assignments, channel communication, and disposal.
- Created InMemoryTransportOptionsTests to validate default values and customizable options for InMemory transport.
- Developed RabbitMqFrameProtocolTests to ensure correct parsing and property creation for RabbitMQ frames.
- Added RabbitMqTransportOptionsTests to verify default settings and customization options for RabbitMQ transport.
- Updated project files for testing libraries and dependencies.

src/__Libraries/__Tests/StellaOps.Microservice.Tests/StellaOps.Microservice.Tests.csproj

@@ -0,0 +1,32 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <LangVersion>preview</LangVersion>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <!-- Suppress CA2255 from OpenSSL auto-init shim included via Directory.Build.props -->
+    <NoWarn>$(NoWarn);CA2255</NoWarn>
+    <IsPackable>false</IsPackable>
+    <RootNamespace>StellaOps.Microservice.Tests</RootNamespace>
+    <!-- Disable Concelier test infrastructure (Mongo2Go, etc.) since not needed for Microservice SDK tests -->
+    <UseConcelierTestInfra>false</UseConcelierTestInfra>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+    <Using Include="FluentAssertions" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <!-- Test SDK packages come from Directory.Build.props -->
+    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\StellaOps.Microservice\StellaOps.Microservice.csproj" />
+    <ProjectReference Include="..\StellaOps.Router.Testing\StellaOps.Router.Testing.csproj" />
+  </ItemGroup>
+
+</Project>