making good progress on realtime data integration.

lib/pages/analytics/services/realtime_device_service/firebase_realtime_device_service.dart

@@ -0,0 +1,28 @@
+import 'package:firebase_database/firebase_database.dart';
+import 'package:syncrow_web/pages/analytics/services/realtime_device_service/realtime_device_service.dart';
+import 'package:syncrow_web/pages/device_managment/all_devices/models/device_status.dart';
+
+class FirebaseRealtimeDeviceService implements RealtimeDeviceService {
+  @override
+  Stream<Status> subscribe(String deviceId) {
+    try {
+      final ref = FirebaseDatabase.instance.ref('device-status/$deviceId');
+
+      return ref.onValue.asyncMap((DatabaseEvent event) {
+        final data = event.snapshot.value as Map<dynamic, dynamic>?;
+
+        if (data == null || data['status'] == null) {
+          throw Exception('Invalid data received from Firebase');
+        }
+
+        final statusMap = data['status'] as Map<dynamic, dynamic>;
+        return Status(
+          code: statusMap['code'] as String? ?? '',
+          value: statusMap['value'] as String? ?? '',
+        );
+      });
+    } catch (e) {
+      throw Exception('Error subscribing to device status: $e');
+    }
+  }
+}

lib/pages/analytics/services/realtime_device_service/realtime_device_service.dart

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+import 'package:syncrow_web/pages/device_managment/all_devices/models/device_status.dart';
+
+abstract interface class RealtimeDeviceService {
+  Stream<Status> subscribe(String deviceId);
+}