fix: remove Python 3.10+ zip strict parameter for Python 3.9 compatibility

Remove the strict=False parameter from zip() call in api.py as it was
introduced in Python 3.10 and causes "TypeError: zip() takes no keyword
arguments" in Python 3.9.

The strict parameter controls whether zip() raises an exception when the
iterables have different lengths. Since we're not relying on this behavior
and the code works correctly without it, removing it maintains the same
functionality while ensuring Python 3.9 compatibility.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/leann-core/src/leann/api.py

@@ -554,7 +554,7 @@ class LeannSearcher:
         if "labels" in results and "distances" in results:
             logger.info(f"  Processing {len(results['labels'][0])} passage IDs:")
             for i, (string_id, dist) in enumerate(
-                zip(results["labels"][0], results["distances"][0], strict=False)
+                zip(results["labels"][0], results["distances"][0])
             ):
                 try:
                     passage_data = self.passage_manager.get_passage(string_id)