Measure - Condensate per min/hour/day/...

[benjaminplanche]

Idea

To adapt the granularity when fetching measures, the server could crunch once and for all the measures of a stream over a set time span, saving the result in DB.

This way, if a User wants to display measures taken over a large period, we could avoid flooding him with too much data points.

Proposition

• Create a new model, extending Measure, with 2 timestamps to define the covered time span and several condensate values (avg, med, min, max, ...?)
• Adapt the Measure controller and its routes