fix(group): ensure "Group" satisfies the configProvider interface

[leonklingele]

Before this change, using Huma's route group feature would not propagate Huma's config to the group router and cause all routes attached to a group to use a default Huma config.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.12%. Comparing base (58edcf2) to head (f658a43).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #976   +/-   ##
=======================================
  Coverage   93.11%   93.12%           
=======================================
  Files          23       23           
  Lines        4766     4768    +2     
=======================================
+ Hits         4438     4440    +2     
  Misses        269      269           
  Partials       59       59           

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[Copilot]

Pull request overview

This pull request fixes a bug where route groups were not propagating Huma's configuration, causing all routes attached to a group to use default config values instead of the API's configured values.

Changes:

• Added Config() method to Group type to implement the configProvider interface
• Added compile-time interface assertions to ensure Group, api, and mapRegistry properly implement their respective interfaces
• Added test case to verify config propagation works correctly for grouped routes

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
group.go	Implemented Config() method for Group type and added interface assertions
api.go	Added compile-time interface assertions for api type
registry.go	Added compile-time interface assertions for mapRegistry type
huma_test.go	Added test to verify config propagation through groups

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[wolveix]

Great catch! The tests should include group in their name, since currently they look the same as the normal tests.

I like the interface implementation requirement, though there should be a comment with them so they're clear to everyone :)

[leonklingele]

Updated, ptal :)