Support start_time and end_time query parameters

[nrozanov]

Description

Support start_time and end_time query parameters for GET /assets/<id> call

Look & Feel

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How to test

Pass new parameters to GET /assets/<id>, check we get data that is more recent than start_time and older than end_time

Further Improvements

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Related Items

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• I agree to contribute to the project under Apache 2 License.
• To the best of my knowledge, the proposed patch is not based on code under GPL or other license that is incompatible with FlexMeasures

[nhoening]

Good start!

• Let's add a small link icon under the graphs on the asset page (or next to it), to copy the link to the current view. That would make it easy to share the current view with others.
• I would like the date picker to reflect the time range, as well.
• Please check the parameters better. They lead to an error if the timezone info is missing or if they are None - see

One more thing I see (maybe not caused by this PR: When I reload the asset page, it doesn't pick the time range from the session (the /assets/<id>/chart endpoint calls set_session_variables("event_starts_after", "event_ends_before")), but goes back to the default (today + tomorrow). The sensor page seems to do that correct. This could also become another issue.

[nhoening]

Great work, almost there.

I noticed one potential small bug: When I select a few days in the datepicker, e.g. 22.-25 of April, then copy the link and apply it, then the date picker has marked only 22.-24. of April.
When I set the timezone offset of the end_date in the URL to 00:00 and reload, it shows 22.-25. In base.html, line 470f, the picker throws off hours, that might be the reason.
We can also make a new issue out of this, it wasn't caused by this PR.

[nhoening]

Thanks!

[nhoening]

Please add a changelog entry, then we'll merge!