Feature Request: add the ability to add provenance to each component of proofing

[stappan]

Feature Request: add the ability to add provenance to each component of proofing (origin/via/destination/forward connection)

Use-case: there is different types of evidence available for parts of populations. Sometimes we know explicitly where a population projects. but not the entire path. We would like to be able to attach the provenance, and have the ability to export that to be visible to the public / SCKAN.