backend: Add api endpoints for measurements based on timestamps

[Glukoosi]

No description provided.

[Kumikurre]

I think we could utilize this kind of enpoint in the frontend:

router.GET("/temp_measurements/from/:start_time/to/:end_time", routes.GetTempMeasurements)

or even simpler:

router.GET("/temp_measurements/from/:start_time", routes.GetTempMeasurements)

Notice that no mention if device in those proposals. Othen than that request, the diff looks very good to me

[Glukoosi]

I think we could utilize this kind of enpoint in the frontend:

router.GET("/temp_measurements/from/:start_time/to/:end_time", routes.GetTempMeasurements)

or even simpler:

router.GET("/temp_measurements/from/:start_time", routes.GetTempMeasurements)

Notice that no mention if device in those proposals. Othen than that request, the diff looks very good to me

router.GET("/temp_measurements_all/from/:start_time/to/:end_time", routes.GetTempMeasurements)
and
router.GET("/temp_measurements_all/from/:start_time", routes.GetTempMeasurements)

are now implemented (had to add _all 'cause gin limitations) gin-gonic/gin#1301

[Kumikurre]

Great work. I'll merge this