Set PEER_SERVICE span attribute on client rpcs

ai_web_common/rpc/core.py

@@ -232,6 +232,7 @@ class ClientStub():
                 f'[client-rpc] {self.NAME}',
                 kind=trace.SpanKind.CLIENT,
                 attributes={
+                    SpanAttributes.PEER_SERVICE: self.NAME,
                     SpanAttributes.HTTP_URL: parsed_url.url,
                     SpanAttributes.HTTP_HOST: target_addr,
                     SpanAttributes.HTTP_METHOD: 'POST',