[BUG] FrozenError: can't modify frozen RDF::URI

[cjcolvar]

Describe the bug
This error first started appearing after upgrading to 7.7.0 and comes up sporadically. I've seen it in the reindexing script and there are some honeybadger issues for places where it has popped up:

• MediaObjectIndexingJob (https://app.honeybadger.io/projects/54117/faults/105775873)
• WaveformJob (https://app.honeybadger.io/projects/54117/faults/105984511)

I'm not sure if this is a real problem or not because if it comes up in a background job then the job should rerun.

This is probably related to an issue in ruby-rdf (and related gems) and/or activeTriples and active-fedora.

Intermittent race condition; if it's confined to background jobs, it will eventually resolve itself but still could be causing other errors.

Done Looks Like

• Error investigated and resolved