Add some missing justifications

[matentzn]

There must be a better way to do this in LinkML by now!

• docs/ have been added/updated if necessary
• make test has been run locally
• tests have been added/updated (if applicable)
• CHANGELOG.md has been updated.

If you are proposing a change to the SSSOM metadata model, you must

• provide a full, working and valid example in examples/
• provide a link to the related GitHub issue in the see_also field of the linkml model
• provide a link to a valid example in the see_also field of the linkml model
• run SSSOM-Py test suite against the updated model

This is adding a number of newer justifications to the validation rules of the schema.

• Ask LinkML community what the state of the art way to do this is!

[ehartley]

Looks good!

I'm also curious to know if LinkML has a better way to do this.

[anitacaron]

I double-checked if there isn't any more missing justifications, and everything looks good.

[matentzn]

Thank you both!