Coordinates being demoted when writing to Icechunk

[TomNicholas]

I'm seeing almost all (but somehow not all) my virtual coordinate variables being demoted to data variables when writing to icechunk. They are coordinates, I write them, read them, now they are data variables.

I have no idea whether this is the fault of VirtualiZarr, Xarray, Zarr, or Icechunk. Probably VirtualiZarr's fault though.

I don't have a MVCE yet though.

[mpiannucci]

This is probably virtualizarrs fault. No zarr attrs are parsed or manipulated at all by icechunk

[TomNicholas]

I know I just wanted to make you look to tempt you into fixing it :P