refactor: Simplify index settings retrieval in reindex_atomic.py

- Removed unnecessary parentheses in the index settings extraction logic for cleaner code.
- Maintained functionality while improving readability of the codebase.

This commit enhances the clarity of the reindexing script without altering its behavior.

Author: ewlarson

backend/scripts/reindex_atomic.py

@@ -347,9 +347,7 @@ async def _bulk_index_documents(
 
 async def _apply_fast_index_settings(index_name: str, force_replicas_zero: bool) -> dict[str, str]:
     settings_response = await es.indices.get_settings(index=index_name)
-    index_settings = (
-        settings_response.get(index_name, {}).get("settings", {}).get("index", {})
-    )
+    index_settings = settings_response.get(index_name, {}).get("settings", {}).get("index", {})
 
     previous = {
         "refresh_interval": str(index_settings.get("refresh_interval", "1s")),