fix: camel case to snake case conversion (#4966)

libs/sdk-js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@langchain/langgraph-sdk",
-  "version": "0.0.82",
+  "version": "0.0.83",
   "description": "Client library for interacting with the LangGraph API",
   "type": "module",
   "packageManager": "yarn@1.22.19",

libs/sdk-js/src/client.ts

@@ -979,7 +979,12 @@ export class RunsClient<
       after_seconds: payload?.afterSeconds,
       if_not_exists: payload?.ifNotExists,
       checkpoint_during: payload?.checkpointDuring,
-      langsmith_tracer: payload?._langsmithTracer,
+      langsmith_tracer: payload?._langsmithTracer
+        ? {
+            project_name: payload?._langsmithTracer?.projectName,
+            example_id: payload?._langsmithTracer?.exampleId,
+          }
+        : undefined,
     };
 
     const [run, response] = await this.fetch<Run>(`/threads/${threadId}/runs`, {