Fix getAsync + delAsync redis errors

[mau11]

Fixes # (issue)

Description

During the Node 20 update, redis was also updated and getAsync() + delAsync() functions were deprecated. In Spoke v14.1, we merged in older code that still contained these functions. This branch cleans them up and prevents errors like below:

Checklist:

• I have manually tested my changes on desktop and mobile
• The test suite passes locally with my changes
• If my change is a UI change, I have attached a screenshot to the description section of this pull request
• My change is 300 lines of code or less, or has a documented reason in the description why it’s longer
• I have made any necessary changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• My PR is labeled [WIP] if it is in progress

[engelhartrueben]

🎉