[IMP] queue_job: Handle TypeError when JSON-encoding context.

[amh-mw]

This nulls out unencodable values when serializing the job context, instead of raising an error.

[OCA-git-bot]

Hi @guewen, @sbidoul,
some modules you are maintaining are being modified, check this out!

[amh-mw]

I am of the opinion that queue_job should not be in the context-management game, so this is an effort to increase durability when the context may not have been curated.

[sbidoul]

I don't know. I personally prefer fast and explicit failures than silent degradation that would be harder to diagnose.

What is the use case?

[amh-mw]

I'm currently running a variant of #768 where I ripped out all of the context management code. Then when I adopted queue_job_batch, I started getting JSON encoding errors.

[github-actions]

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