Improve DB efficiency for user settings

[SchrodingersGat]

• Prefetch related user
• Prevents 1+N issue

Before

After

[netlify]

✅ Deploy Preview for inventree-web-pui-preview canceled.

Name	Link
🔨 Latest commit	c46e6dc
🔍 Latest deploy log	https://app.netlify.com/sites/inventree-web-pui-preview/deploys/661723171ecef20008aed3ce

[matmair]

Very nice! In theory we/you should get alerts about these kinds of errors in sentry - do they show up there?

[SchrodingersGat]

I haven't seen sentry reporting anything like this.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.25%. Comparing base (1e0382c) to head (c46e6dc).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6996   +/-   ##
=======================================
  Coverage   84.24%   84.25%           
=======================================
  Files         875      875           
  Lines       40863    40867    +4     
  Branches      284      284           
=======================================
+ Hits        34426    34431    +5     
+ Misses       6364     6363    -1     
  Partials       73       73           

Flag	Coverage Δ
backend	85.44% <100.00%> (+<0.01%)	⬆️

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