Integrate CF/ACDD compliance checking

In order to verify the Conventions metadata in output files, we would need to integrate CF/ACDD compliance checks into the processing chain.

http://cfconventions.org/software.html
https://github.com/ioos/compliance-checker

No timeline at this stage, just a thought starter.

Start by reviewing the processing chain and the linked CF Conventions and IOOS compliance-checker resources. Determine where output files are produced and how compliance results should be handled; done means CF/ACDD checks are integrated into that chain with a defined outcome for non-compliant metadata.

Written by the indexing model from the issue text.