fix: add CELERY_RESULT_BACKEND with default django-cache

[navinkarkera]

Configuration Pull Request

Cherry pick of #6720

Note: This PR has a corresponding edx-platform PR openedx/openedx-platform#30245

Description

At Opencraft, we want to run multiple instances of celery workers in separate servers. The celery workers need to be able to share task results. Currently, the CELERY_RESULT_BACKEND is hard coded to use django-cache.

So this PR allows to setup CELERY_RESULT_BACKEND via configuration.

To use django ORM as celery backend, one can set CELERY_RESULT_BACKEND to django-db as described in docs.

Supporting information

• Task: https://tasks.opencraft.com/browse/BB-6077

Deadline

"None"

[openedx-webhooks]

Thanks for the pull request, @navinkarkera! I've created OSPR-6622 to keep track of it in JIRA, where we prioritize reviews. Please note that it may take us up to several weeks or months to complete a review and merge your PR.

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[natabene]

@navinkarkera Thank you for the contribution. Is this ready for our review?

[kaustavb12]

Hi @natabene !

This is not ready for your review yet. I'll ping you here once ready.

[natabene]

@navinkarkera Just checking if this is ready.

[kaustavb12]

@natabene We have scheduled to review and test this internally in the ongoing sprint. Will ping here once ready. Perhaps early next week.

[kaustavb12]

👍

Looks good to go from my end.

• I tested this: Changes tested in the PR sandbox
• I read through the code
• Includes documentation

[navinkarkera]

@natabene This is ready for your review.

[natabene]

@navinkarkera Thanks, I am lining this up for our review.

[natabene]

@BbrSofiane This is ready for your review.

[OmarIthawi]

@navinkarkera This is on lilac but the other PR is on nutmeg did I miss anything?

[navinkarkera]

@navinkarkera This is on lilac but the other PR is on nutmeg did I miss anything?

@OmarIthawi We also have one for lilac

[openedx-webhooks]

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