Marking SSE transport as deprecated (#775)

Fixes #759

Author: aaronpowell

src/CommunityToolkit.Aspire.Hosting.McpInspector/McpInspectorResourceBuilderExtensions.cs

@@ -52,7 +52,9 @@ public static IResourceBuilder<McpInspectorResource> AddMcpInspector(this IDistr
                 transport = s.TransportType switch
                 {
                     McpTransportType.StreamableHttp => "streamable-http",
+#pragma warning disable CS0618
                     McpTransportType.Sse => "sse",
+#pragma warning restore CS0618
                     _ => throw new NotSupportedException($"The transport type {s.TransportType} is not supported.")
                 },
                 endpoint = s.Endpoint.Url

src/CommunityToolkit.Aspire.Hosting.McpInspector/McpTransportType.cs

@@ -13,5 +13,6 @@ public enum McpTransportType
     /// <summary>
     /// The MCP server uses Server Sent Events (SSE) as the transport type.
     /// </summary>
+    [Obsolete("SSE Transport is deprecated in the MCP spec, use StreamableHttp instead. This will be removed in the next release.")]
     Sse
 }

tests/CommunityToolkit.Aspire.Hosting.McpInspector.Tests/McpInspectorResourceBuilderExtensionsTests.cs

@@ -60,7 +60,9 @@ public void WithMcpServerAddsServerToResource()
 
     [Theory]
     [InlineData(McpTransportType.StreamableHttp)]
+#pragma warning disable CS0618
     [InlineData(McpTransportType.Sse)]
+#pragma warning restore CS0618
     public void WithMcpServerSpecificTransportTypeAddsServerToResource(McpTransportType transportType)
     {
         // Arrange