Resolve missing kind preventing successful sync of quiz logs and quieter sync logging

[bjester]

Summary

• Updates logging API to set kind for ContentSessionLog
• Adds minimum length validator to some non-blank char fields to ensure they're not blank
• Reduces log messaging originating from sync

References

Addresses @pcenov's comment
Resolves #8394

Reviewer guidance

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[rtibbles]

Code changes look good - seems like Django is not entirely convinced that the migration for the logger app exists? Possible it's some weird Py2/3 discrepancy, so maybe try rerunning makemigrations with Python 2 and see if anything different pops up?

[bjester]

@rtibbles I didn't think it needed a migration, and thought I would see a warning running tests if it did, so I didn't initially commit a migration 👍

[rtibbles]

Ah - gotcha! Yeah, Django likes to add a migration for any model change, regardless of whether it actually affects the DB or not.

[pcenov]

Hi @bjester, while testing this I noticed that only the first part of my comment is fixed with this PR namely a Coach is now able to see the scores of a learner and any questions answered.
At the same time my second point is still valid: I imported a full 0.14 facility to a 0.15 one and synced it. When I go to check the scores of a learner as a Coach the page with the quiz scores is not displayed and there's an error in the console: Uncaught (in promise) TypeError: currentAttempt.interaction_history.filter is not a function:

[rtibbles]

@bjester - weird that interaction history is not an array, but perhaps we can coerce that in the API request, in the case that it is falsy for some reason?

[bjester]

Thanks for testing @pcenov! What instance was the quiz completed on? And what instance did you check the result as the Coach? I should have noted in the prior PR that we didn't make the quiz results compatible with older versions, so if the quiz was completed on 0.15 then I wouldn't expect it to show up correctly in 0.14, but the other way around should work appropriately

[pcenov]

The quiz was completed on the 14.7 instance which was then imported in 0.15 where I was subsequently checking the results. So yeah, it seems that there is an issue indeed.

[bjester]

Okay yes that sounds like a bug. I will investigate.