fix: handle swagger:type array by falling through to underlying type resolution

[KT-Doan]

Problem

When swagger:type is set to a value not handled by swaggerSchemaForType (e.g., array), the annotation is silently ignored in multiple code paths, producing incomplete or empty schemas.

This affects three named-type builder functions:

• Type definitions (buildFromType): swaggerSchemaForType error was silently discarded with _ =, returning nil with no type info
• Named slice fields (buildNamedSlice): no swagger:type check at all, always fell through to makeRef creating a $ref even when the type definition was suppressed
• Named array fields (buildNamedArray): same as slices
• Named struct fields (buildNamedStruct): swaggerSchemaForType error was silently discarded with _ =

Example

// swagger:type array
type StringSlice []string

// swagger:model myModel
type MyModel struct {
    Tags StringSlice `json:"tags"`
}

Before: Tags gets {"$ref": "#/definitions/StringSlice"} or an empty schema (description only, no type). The StringSlice definition is suppressed because swagger:type is present, so the $ref points to nothing.

After: Tags gets {"type": "array", "items": {"type": "string"}, "description": "..."} — correctly inlined with full type information and description preserved.

Fix

When swaggerSchemaForType returns an error for an unsupported type name:

• buildFromType: fall through to s.buildFromType(underlying) to resolve the actual Go type
• buildNamedSlice: skip makeRef, inline the slice by building from the element type
• buildNamedArray: same approach as slices
• buildNamedStruct: fall through to makeRef instead of returning an empty schema

This is backwards-compatible: supported type names (string, bool, int64, object, etc.) continue to work as before. Only previously-broken unsupported values now produce correct schemas.

Fixes #10

[codecov]

Codecov Report

❌ Patch coverage is 26.66667% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.34%. Comparing base (7e52966) to head (6c1ce4b).
⚠️ Report is 5 commits behind head on master.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
schema.go	26.66%	8 Missing and 3 partials ⚠️

❌ Your patch status has failed because the patch coverage (26.66%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #11      +/-   ##
==========================================
- Coverage   72.43%   72.34%   -0.10%     
==========================================
  Files          14       14              
  Lines        3795     3804       +9     
==========================================
+ Hits         2749     2752       +3     
- Misses        734      738       +4     
- Partials      312      314       +2     

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

[KT-Doan]

Codecov Report

❌ Patch coverage is 26.66667% with 11 lines in your changes missing coverage. Please review. ✅ Project coverage is 72.34%. Comparing base (7e52966) to head (57152d0). ⚠️ Report is 4 commits behind head on master. ✅ All tests successful. No failed tests found.

Files with missing lines Patch % Lines
schema.go 26.66% 8 Missing and 3 partials ⚠️
❌ Your patch check has failed because the patch coverage (26.66%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #11      +/-   ##
==========================================
- Coverage   72.43%   72.34%   -0.10%     
==========================================
  Files          14       14              
  Lines        3795     3804       +9     
==========================================
+ Hits         2749     2752       +3     
- Misses        734      738       +4     
- Partials      312      314       +2     

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

Ah I didn't add tests for the other three fixes, let me do that now.

[KT-Doan]

@fredbi I added the remaining tests! please approve the workflow when you have the chance 🙇

[fredbi]

Thanks. Really appreciate this fix.
The whole point of making this a separate lib was to allow for easier fixing like this one. Thanks for your contribution !