Feature request - object table: separate jdmin/max and ncand for each band, add jd(mag=magmin/max)

[mnicholl]

Some streaming queries would benefit from being able to specify a number or timing of detections in each band separately. Right now I can only use the most recent detection in any band, rather than e.g. most recent detection in g band.

Another useful thing would be if the object table contained the corresponding jd's for the max and min magnitudes (also separated by band)

[RoyWilliams]

Thanks for these Matt, we can try to put them in, I have put them into the hopper.
Just to say, we already have a few updates (see https://lasair-iris.roe.ac.uk/schema)
In particular we have jdgmax and jdgmax, latest detections for each filter, and dm/dt for most recent and second most recent detections.