Logging improvements to Run related classes

[Vlatombe]

These are logging improvements that were useful to investigate exotic Run loading issues.

Testing done

Proposed changelog entries

• N/A

Proposed upgrade guidelines

N/A

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@mention

Before the changes are marked as ready-for-merge:

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[jglick]

👍 common issue when using unexpected threads

[jglick]

(could also/instead log from whatever code returns null when principal lacks READ)

[timja]

/label ready-for-merge

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This PR is now ready for merge, after ~24 hours, we will merge it if there's no negative feedback.

Thanks!