[robtme]

Pointers to arrays and slices were decayed to the element-less type before schema generation, so any array type rendered as a string lost its pointer nullability. That covers *uuid.UUID (stdlib), *net.IP, *[]byte and [N]byte TextUnmarshalers like google/uuid. schemaFromType already derefs, and real array schemas take nullability from DefaultArrayNullable, so the decay block is removed rather than special-cased.

• Spec output changes for existing users: these fields become ["string", "null"]. Worth a release note.
• Aliased pointer types still lose nullability (r.aliases[t] recurses on the deref'd type). That predates this change, so I left it alone.

Fixes #1155

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.72%. Comparing base (dcdadba) to head (9db6c0d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1157      +/-   ##
==========================================
- Coverage   94.72%   94.72%   -0.01%     
==========================================
  Files          25       25              
  Lines        5195     5193       -2     
==========================================
- Hits         4921     4919       -2     
  Misses        269      269              
  Partials        5        5              

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