Units in NMDC

[mslarae13]

This is a super issue to gather all the existing issues about units in NMDC. This includes what units we should require, in what format, and how they'll be enforced. As well as how units will be required or expressed in NMDC schema vs submission schema.

• [ ] https://github.com/microbiomedata/nmdc-schema/issues/1257
• [ ] https://github.com/microbiomedata/sample-annotator/issues/11
• [ ] https://github.com/microbiomedata/submission-schema/issues/210
• [ ] https://github.com/microbiomedata/submission-schema/issues/206
• [ ] https://github.com/microbiomedata/nmdc-schema/issues/857
• [ ] https://github.com/microbiomedata/metadata_converter/issues/9
• [ ] https://github.com/microbiomedata/issues/issues/236
• [ ] https://github.com/microbiomedata/DataHarmonizer/issues/122
• [ ] https://github.com/microbiomedata/sample-annotator/issues/12

[mslarae13]

It was decided that NMDC would implement UCUM units.