fix bug

pkg/logger/fields.go

@@ -0,0 +1,16 @@
+package logger
+
+const (
+	FieldChannel  = "channel"
+	FieldChatID   = "chat_id"
+	FieldSenderID = "sender_id"
+	FieldPreview  = "preview"
+	FieldError    = "error"
+
+	FieldMessageContentLength      = "message_content_length"
+	FieldAssistantContentLength    = "assistant_content_length"
+	FieldUserResponseContentLength = "user_response_content_length"
+	FieldFetchedContentLength      = "fetched_content_length"
+	FieldOutputContentLength       = "output_content_length"
+	FieldTranscriptLength          = "transcript_length"
+)