fix: measurements_per_day query

[dervoeti]

Fix for the waterlevel demo.

The actual difference here is that I adapted the query for the measurements_per_day dataset:

It was this:

SELECT FLOOR(__time TO 'day') as __time, count(*) as measurements
FROM "druid"."measurements"
GROUP BY 1

Which was failing with Druid 31.0.1. I'm actually not sure why, but Druid responded with Error parsing near 'TO' at line 1:22. I briefly checked the docs and changelogs and didn't really find a reason why this would not be valid anymore.

However, it's now:

SELECT TIME_FLOOR("__time", 'P1D') AS __time, COUNT(*) AS measurements
FROM "druid"."measurements"
GROUP BY 1

which works fine.

To see the actual diff, the zip file need to be unpacked and compared to the content of the current archive.

[NickLarsenNZ]

LGTM. It is unfortunate that we have to restore superset via zip :/