Publish metrics on servers being started

Author: adwsingh

mcp/mcp-cli/src/main/java/software/amazon/smithy/java/mcp/cli/commands/StartServer.java

@@ -191,6 +191,14 @@ public void execute(ExecutionContext context) throws IOException {
                                 .build());
             }
 
+            var metrics = context.metrics();
+            var mcpsStarted = String.join(":", services.keySet());
+            metrics.addProperty("McpStarted", mcpsStarted);
+
+            if (toolAssistant) {
+                metrics.addCount("ToolAssistant", 1);
+            }
+
             this.mcpServer =
                     (McpServer) McpServer.builder()
                             .stdio()