migrate /boxes/:boxId/data & /boxes/:boxId/:sensorId

Both endpoints use the following:

| Method | Implementation to be migrated |
| --- | --- |
| POST | [`measurementsController.postNewMeasurements`](https://github.com/openSenseMap/api/blob/4768a9ea5bffd5a6ab67a0f3442628399a5dfab3/packages/api/lib/controllers/measurementsController.js#L486) |