fix chat history

Author: ilvalerione

src/Chat/History/AbstractChatHistory.php

@@ -194,9 +194,9 @@ protected function deserializeToolCallResult(array $message): ToolResultMessage
     }
 
     /**
-     * Deserialize content from storage format to ContentBlock array.
+     * Deserialize content from the storage format to the ContentBlock array.
      *
-     * Handles both legacy string format and new content block array format.
+     * Handles both legacy string format and the new content block array format.
      * Legacy formats are automatically converted to ContentBlocks for migration.
      *
      * @return string|ContentBlockInterface|ContentBlockInterface[]|null

src/Chat/History/EloquentChatHistory.php

@@ -122,7 +122,7 @@ protected function serializeMessageMeta(Message $message): array
         $serialized = $message->jsonSerialize();
 
         // Remove fields that are stored in separate columns
-        unset($serialized['role'], $serialized['content'], $message['usage']);
+        unset($serialized['role'], $serialized['content']);
 
         return $serialized;
     }