added uptime monitoring

lib/providers/uptime_provider.dart

@@ -0,0 +1,54 @@
+import 'package:flutter/foundation.dart';
+import 'package:qpay/http/http.dart';
+import 'package:qpay/models/uptime_item_model.dart';
+
+enum UptimeStatus { idle, loading, success, error }
+
+class UptimeProvider extends ChangeNotifier {
+  final Http _http = Http();
+
+  UptimeStatus _status = UptimeStatus.idle;
+  List<UptimeItemModel> _items = [];
+  String? _error;
+
+  UptimeStatus get status => _status;
+  List<UptimeItemModel> get items => _items;
+  String? get error => _error;
+  bool get isLoading => _status == UptimeStatus.loading;
+  bool get hasError => _status == UptimeStatus.error;
+
+  /// Count of services that are currently up (status == true).
+  int get upCount => _items.where((i) => i.status).length;
+
+  /// Count of services that are currently down (status == false).
+  int get downCount => _items.where((i) => !i.status).length;
+
+  Future<void> fetchUptimes() async {
+    _status = UptimeStatus.loading;
+    _error = null;
+    notifyListeners();
+
+    try {
+      final response = await _http.getRaw(
+        '/public/uptimes?sort=createdAt%2Cdesc',
+      );
+
+      if (response.statusCode == 200) {
+        final body = response.data as Map<String, dynamic>;
+        final content = body['content'] as List<dynamic>;
+        _items = content
+            .map((e) => UptimeItemModel.fromJson(e as Map<String, dynamic>))
+            .toList();
+        _status = UptimeStatus.success;
+      } else {
+        _error = 'Failed to load uptime data (status ${response.statusCode})';
+        _status = UptimeStatus.error;
+      }
+    } catch (e) {
+      _error = 'Network error: ${e.toString()}';
+      _status = UptimeStatus.error;
+    }
+
+    notifyListeners();
+  }
+}