[CLN] Add trace for memberlist update (#1912)

## Description of changes

*Summarize the changes made by this PR.*
 - Improvements & Bug fixes
	 - Add trace
 - New functionality
	 - None

## Test plan
*How are these changes tested?*
- [x] Tests pass locally with `pytest` for python, `yarn test` for js,
`cargo test` for rust

## Documentation Changes
None

chromadb/segment/impl/distributed/segment_directory.py

@@ -10,6 +10,11 @@
 from kubernetes import client, config, watch
 from kubernetes.client.rest import ApiException
 import threading
+from chromadb.telemetry.opentelemetry import (
+    OpenTelemetryGranularity,
+    add_attributes_to_current_span,
+    trace_method,
+)
 
 from chromadb.utils.rendezvous_hash import assign, murmur3hasher
 
@@ -226,6 +231,11 @@ def register_updated_segment_callback(
     ) -> None:
         raise NotImplementedError()
 
+    @trace_method(
+        "RendezvousHashSegmentDirectory._update_memberlist",
+        OpenTelemetryGranularity.ALL,
+    )
     def _update_memberlist(self, memberlist: Memberlist) -> None:
         with self._curr_memberlist_mutex:
+            add_attributes_to_current_span({"new_memberlist": memberlist})
             self._curr_memberlist = memberlist