docs(dataset): document the ValueError raised by insert's argument checks

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: alexkuzmik

sdks/python/src/opik/api_objects/dataset/dataset.py

@@ -805,6 +805,10 @@ def insert(
                 batches that already succeeded stay persisted. Older Opik
                 backends do not support parallel upload and fall back to a
                 sequential one.
+
+        Raises:
+            ValueError: If ``num_threads`` is not a positive integer, or
+                ``deduplication`` is not a bool.
         """
         if isinstance(num_threads, bool) or not isinstance(num_threads, int):
             raise ValueError("num_threads must be a positive integer")