dd-trace registers its own global propagator (#72)

Author: enisdenjo

packages/documentation/content/docs/gateway/monitoring-tracing.mdx

@@ -765,6 +765,7 @@ const { TracerProvider } = ddTrace.init({
 
 openTelemetrySetup({
   contextManager: null, // Don't register a context manager, DataDog Agent registers its own.
+  propagators: [], // Disable default propagators; dd-trace already set the global one (DD headers propagate to backends).
   traces: {
     tracerProvider: new TracerProvider(),
   },