fix(open-platform): align realtime online status across protocols

vehicle-data-platform/apps/api/internal/openplatform/mysql.go

@@ -162,13 +162,20 @@ ORDER BY l.vin,
 		return nil, err
 	}
 	defer rows.Close()
+	onlineThreshold := now.Add(-time.Minute)
 	for rows.Next() {
 		var point RealtimeVehiclePoint
 		if err := rows.Scan(&point.VIN, &point.Protocol, &point.Longitude, &point.Latitude, &point.SpeedKmh, &point.TotalMileageKm, &point.ObservedAt); err != nil {
 			return nil, err
 		}
-		if _, exists := out[point.VIN]; !exists {
+		point.Online = !point.ObservedAt.Before(onlineThreshold)
+		if selected, exists := out[point.VIN]; !exists {
 			out[point.VIN] = point
+		} else if point.Online && !selected.Online {
+			// The selected source still follows the documented protocol priority, but
+			// online means that any source for this VIN reported in the last minute.
+			selected.Online = true
+			out[point.VIN] = selected
 		}
 	}
 	return out, rows.Err()