lab attacehmenent model added

android/settings.gradle

@@ -19,7 +19,7 @@ pluginManagement {
 plugins {
     id 'dev.flutter.flutter-plugin-loader' version "1.0.0" // apply true
     id "org.jetbrains.kotlin.android" version "2.0.0" apply false
-    id 'com.android.application' version "8.3.2" apply false
+    id 'com.android.application' version "8.9.0" apply false
     id "com.google.gms.google-services" version "4.4.0" apply false
 
 }

lib/core/model/labs/lab_attachment_item.dart

@@ -0,0 +1,28 @@
+class LabAttachmentItem {
+  String? base64Content;
+  String? fileName;
+  int? fileSize;
+
+  LabAttachmentItem({this.base64Content, this.fileName, this.fileSize});
+
+  LabAttachmentItem.fromJson(Map<String, dynamic> json) {
+    base64Content = json['base64Content'];
+    fileName = json['fileName'];
+    fileSize = json['fileSize'];
+  }
+
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = Map<String, dynamic>();
+    data['base64Content'] = base64Content;
+    data['fileName'] = fileName;
+    data['fileSize'] = fileSize;
+    return data;
+  }
+
+  static List<LabAttachmentItem> fromJsonList(List<dynamic> jsonList) {
+    return jsonList
+        .map((item) => LabAttachmentItem.fromJson(item as Map<String, dynamic>))
+        .toList();
+  }
+}
+