clarify the issue in comments

llama_stack/providers/inline/telemetry/meta_reference/telemetry.py

@@ -84,6 +84,8 @@ class TelemetryAdapter(TelemetryDatasetMixin, Telemetry):
         # Initialize the correct span processor based on the provider state.
         # This is needed since once the span processor is set, it cannot be unset.
         # Recreating the telemetry adapter multiple times will result in duplicate span processors.
+        # Since the library client can be recreated multiple times in a notebook,
+        # the kernel will hold on to the span processor and cause duplicate spans to be written.
         if _TRACER_PROVIDER is None:
             provider = TracerProvider(resource=resource)
             trace.set_tracer_provider(provider)