Updated configuration model

[dmartinol]

Updated according to stacklok/toolhive-registry-server#155

[codecov]

Codecov Report

❌ Patch coverage is 80.82192% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.58%. Comparing base (7e2a5e7) to head (fe59754).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/thv-operator/api/v1alpha1/mcpregistry_types.go	0.00%	8 Missing ⚠️
cmd/thv-operator/pkg/registryapi/config/config.go	90.76%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2712      +/-   ##
==========================================
- Coverage   55.59%   55.58%   -0.02%     
==========================================
  Files         314      314              
  Lines       30445    30460      +15     
==========================================
+ Hits        16925    16930       +5     
- Misses      12033    12038       +5     
- Partials     1487     1492       +5     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.