[17.0][FIX] queue:job: Handle zero max_retries in job retry logic

[zamberjo]

Resolves #814

[OCA-git-bot]

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

[sersanchus]

TSGTM. I have verified that these changes ensure the job will be re-enqueued indefinitely when max_retries is set to 0 and the worker dies unexpectedly (e.g., abrupt termination).

[Copilot]

Pull Request Overview

Fixes handling of zero max_retries in job retry logic by treating zero as NULL to prevent premature job failure. The issue occurred when jobs with max_retries=0 were incorrectly marked as failed instead of being requeued.

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[AnizR]

Code LGTM, thanks for your contribution!

[zamberjo]

@OCA/queue-maintainers Can this be merged?

[sbidoul]

/ocabot merge patch

[OCA-git-bot]

What a great day to merge this nice PR. Let's do it!
Prepared branch 17.0-ocabot-merge-pr-816-by-sbidoul-bump-patch, awaiting test results.

[OCA-git-bot]

Congratulations, your PR was merged at 357fbd0. Thanks a lot for contributing to OCA. ❤️

[sbidoul]

Backport to 16.0 in #817

[sbidoul]

And cherry-picked into #749 for 18.0