feat: add equality operators, make history screen paginated, random performance updates

lib/utils/app_update_util.dart

@@ -36,6 +36,21 @@ class UpdateInfo {
       download: json["download"] ?? "",
     );
   }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is UpdateInfo &&
+          update == other.update &&
+          version == other.version &&
+          notes == other.notes &&
+          mandatory == other.mandatory &&
+          sha256 == other.sha256 &&
+          download == other.download;
+
+  @override
+  int get hashCode =>
+      Object.hash(update, version, notes, mandatory, sha256, download);
 }
 
 class AppUpdateUtil {