Write more metadata

[zacsimile]

When I set up metadata, I wrote in the minimum needed for proof of concept. There's lots of information available that we currently don't write to the image files (i.e. everything in experiment.yaml that isn't in the metadata). We need to port it into our metadata sources. Probably can just stash everything in an additional_metadata dictionary that gets parsed into XML, but I'm open to suggestions.

[AdvancedImagingUTSW]

Looking through metadata.py and I am not seeing the additional_metadata that you reference. Any chance you could provide a bit more information?

For reference, I was looking at the OME-TIFF and BDVReader specifications, here:
https://docs.openmicroscopy.org/ome-model/6.3.1/ome-tiff/specification.html
https://docs.openmicroscopy.org/bio-formats/6.5.1/metadata/BDVReader.html

Is this the same schema that you referenced? Because I also do not see additional_metadata there.