feat!: refactor middlewares to separate init from run

[costela]

This is a POC PR for #831. See the issue for more details.

Fixes #831

[Copilot]

Pull Request Overview

This PR refactors how middleware functions are defined and executed in the huma API by separating initialization from runtime execution. The changes update the middleware function signatures across production and test files, ensuring that middleware now follows the pattern func(next) func(ctx) for improved composability.

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
huma_test.go	Updated middleware function signature in tests
group_test.go	Updated middleware function signature in group tests
group.go	Adjusted UseMiddleware signature to use the Middleware type
chain.go	Refactored middleware chaining to call Middleware functions directly
api_test.go	Updated middleware usage pattern in API tests
api.go	Updated UseMiddleware signature in the API interface and implementation
adapters/humafiber/humafiber_context_test.go	Updated middleware signature in fiber adapter tests
adapters/adapters_test.go	Updated middleware signature in adapter tests

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 93.03%. Comparing base (21709a0) to head (ae01ae5).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
autopatch/autopatch.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #832      +/-   ##
==========================================
- Coverage   93.08%   93.03%   -0.05%     
==========================================
  Files          23       23              
  Lines        5307     5386      +79     
==========================================
+ Hits         4940     5011      +71     
- Misses        314      319       +5     
- Partials       53       56       +3     

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