Enable auto batch (#391)

Co-authored-by: William FH <[email protected]>

python/langsmith/client.py

@@ -343,7 +343,7 @@ def __init__(
         timeout_ms: Optional[int] = None,
         web_url: Optional[str] = None,
         session: Optional[requests.Session] = None,
-        auto_batch_tracing: bool = False,
+        auto_batch_tracing: bool = True,
     ) -> None:
         """Initialize a Client instance.