fix: catch reflect.StructOf panics in schema transformer

[danielgtaylor]

This catches a panic related to an unsupported feature of Go that you might run into with types from third-party libraries. The schema transformer prints a warning, skips the type for inserting links, and moves on. We cannot support this until the underlying language is updated, but at least it won't stop your service from running.

Fixes #371

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.51%. Comparing base (911f3da) to head (d35a748).
Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #375      +/-   ##
==========================================
- Coverage   95.43%   92.51%   -2.93%     
==========================================
  Files          18       20       +2     
  Lines        2935     3513     +578     
==========================================
+ Hits         2801     3250     +449     
- Misses         97      224     +127     
- Partials       37       39       +2     

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