API updates for dashboard beta v1
A few more changes are needed before the release of the "beta v1" of the dashboard, mainly:
- simplify / streamline the output of
/tags/<string:tag>/serial_numbers - restrict the output of the latter endpoint to a given time window
We have tested that the new dashboard works with the result of this merge request. I will prepare another merge request in parallel for the documentation of the whole API.
Tagging @msaimper for information.