Update redisvl/extensions/cache/llm/langcache.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: abrookins

redisvl/extensions/cache/llm/langcache.py

@@ -527,7 +527,7 @@ async def astore(
             logger.warning("LangCache does not support filters")
 
         try:
-            ttl_millis = int(ttl * 1000) if ttl is not None else None
+            ttl_millis = round(ttl * 1000) if ttl is not None else None
             if metadata:
                 safe_metadata = _encode_attributes_for_langcache(metadata)
                 result = await self._client.set_async(