fix: always store and search dashboard alias in lower case

[matthewelwell]

Changes

Always store and search for dashboard aliases in lower case.

How did you test this code?

Added / updated existing tests.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
flagsmith-frontend-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 1, 2024 3:53pm
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 1, 2024 3:53pm

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)	Visit Preview		Oct 1, 2024 3:53pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-4676	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-4676	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-4676	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-4676	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4676	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-4676	Finished ✅	Results ✅

[github-actions]

Uffizzi Preview deployment-56801 was deleted.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.19%. Comparing base (4bca509) to head (d8748e4).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4676   +/-   ##
=======================================
  Coverage   97.19%   97.19%           
=======================================
  Files        1166     1166           
  Lines       40436    40452   +16     
=======================================
+ Hits        39301    39317   +16     
  Misses       1135     1135           

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