Add a schema validation process for features

[MikeLippincott]

Seeing these values made me wonder: could this be used for schema validation? Schema validation is a tool we can implement to help check that data fields and values abide certain expecations. A common tool used for this today is jsonschema. It might seem a bit odd to use that library because the data won't necessarily be JSON, but it could be useful to help define a schema and ranges. Another helpful tool in this space is Pandera which builds on this idea using Pydantic and Pandas idioms.

Originally posted by @d33bs in #92 (comment)