feat: add notification events handling and MQTT integration

- Implemented notification event publishing with a new NotificationEventPublisher interface.
- Created a noopNotificationEventPublisher for testing purposes.
- Added functionality to publish notification created events via MQTT.
- Introduced a new stream event publisher for handling job logs and updates.
- Added database migration for popup_ads table.
- Created tests for notification events and popup ads functionality.
- Established MQTT connection and publishing helpers for event messages.

internal/service/value_helpers.go

@@ -53,6 +53,14 @@ func int32Ptr(value int32) *int32 {
 	return &value
 }
 
+func protoTimestampToTime(value *timestamppb.Timestamp) *time.Time {
+	if value == nil {
+		return nil
+	}
+	timeValue := value.AsTime().UTC()
+	return &timeValue
+}
+
 func protoStringValue(value *string) string {
 	if value == nil {
 		return ""