Fix [Client] [Exporting Messages] JSON Format

- [+] fix(json_exporter.go): update Export method to encode messages as a JSON array instead of individually

export/json_exporter.go

@@ -19,12 +19,11 @@ type JSONExporter struct {
 	Encoder JSONEncoderFunc
 }
 
-// Export writes messages to the writer using the custom JSON encoder
+// Export writes messages to the writer as a JSON array using the custom JSON encoder
 func (e *JSONExporter) Export(messages []map[string]any, writer io.Writer) error {
-	for _, msg := range messages {
-		if err := e.Encoder(msg, writer); err != nil {
-			return fmt.Errorf("failed to encode message to JSON: %v", err)
-		}
+	// Use the encoder to write the entire slice as a JSON array
+	if err := e.Encoder(messages, writer); err != nil {
+		return fmt.Errorf("failed to encode messages to JSON: %v", err)
 	}
 	return nil
 }