[CTM-182] Http4s update

[lucymcnatt]

Leo needs Http4s version 45, and workbench-libs needs to have a compatible version
https://nvd.nist.gov/vuln/detail/CVE-2025-59822

Blaze client is deprecated in favor of ember, so I had to make that switch to update http4s

PR checklist

• For each library you've modified here, decide whether it requires a major, minor, or no version bump. (Click here for guidance)

If you're doing a major or minor version bump to any libraries:

• Bump the version in project/Settings.scala createVersion()
• Update CHANGELOG.md for those libraries
• I promise I used @deprecated instead of deleting code where possible

In all cases:

• Replace the appropriate version hashes in README.md and the CHANGELOG.md for any libs you changed with TRAVIS-REPLACE-ME to auto-update the version string
• Get two thumbsworth of PR review
• Verify all tests go green (CI and coverage tests)
• Squash commits and merge to develop
• Delete branch after merge

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 25.42%. Comparing base (56f2c74) to head (41ed620).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1743      +/-   ##
===========================================
- Coverage    25.46%   25.42%   -0.04%     
===========================================
  Files          105      105              
  Lines         2686     2686              
  Branches       253      253              
===========================================
- Hits           684      683       -1     
- Misses        2002     2003       +1     

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[aednichols]

Do not merge because: we're still not sure of the path forward for related PR DataBiosphere/leonardo#4889