fix: traces docs (#515)

Author: Sarath1018

src/index.ts

@@ -19,6 +19,7 @@ export * from './models/conversational-agent';
 export * from './models/agents';
 export * from './models/document-understanding';
 export * from './models/governance';
+export * from './models/observability';
 
 // Export error handling functionality (public API only)
 export * from './core/errors';

src/models/observability/index.ts

@@ -0,0 +1,7 @@
+/**
+ * Observability Types
+ *
+ * This module exports all types for the Observability functionality.
+ */
+
+export * from './traces';