add voice service call service and more

src/GreenHome.Domain/AlertNotification.cs

@@ -0,0 +1,17 @@
+namespace GreenHome.Domain;
+
+public sealed class AlertNotification
+{
+    public int Id { get; set; }
+    public int DeviceId { get; set; }
+    public Device Device { get; set; } = null!;
+    public int UserId { get; set; }
+    public User User { get; set; } = null!;
+    public string AlertType { get; set; } = string.Empty; // Temperature, Humidity, Soil, Gas, Lux
+    public string Message { get; set; } = string.Empty;
+    public string? MessageOutboxIds { get; set; } // JSON array of message outbox IDs
+    public string? ErrorMessage { get; set; } // Error details if sending failed
+    public DateTime SentAt { get; set; } = DateTime.UtcNow;
+    public bool IsSent { get; set; } = true;
+}
+