Schema description update should be considered as a metadata change

提供された OpenAPI diff を再現し、その後、参照されている 160 行目付近の core/src/main/java/org/openapitools/openapidiff/core/model/ChangedSchema.java を、ChangedMetadata.java および ChangedSchema.java のメタデータ処理と併せて調査する。スキーマの説明のみの変更が、単に後方互換と報告されるのではなく、メタデータの変更として報告されれば完了とする。

Hello,

When diffing this spec:

openapi: 3.0.3
info:
  title: Test
paths:
  /foo:
    post:
      requestBody:
        content:
          application/json:
            schema:
              type: string
              description: desc v1

with this one:

openapi: 3.0.3
info:
  title: Test
paths:
  /foo:
    post:
      requestBody:
        content:
          application/json:
            schema:
              type: string
              description: desc v2

I get the following output:

==========================================================================
==                            API CHANGE LOG                            ==
==========================================================================
                                   Test                                   
--------------------------------------------------------------------------
--                            What's Changed                            --
--------------------------------------------------------------------------
- POST   /foo
  Request:
        - Changed application/json
          Schema: Backward compatible
--------------------------------------------------------------------------
--                                Result                                --
--------------------------------------------------------------------------
                   API changes are backward compatible                    
--------------------------------------------------------------------------

Since only the description field changed, I would expect a "metadata" change instead of a "compatible" one.

Changes to the description are correctly marked as metadata ones internally (see here and here) but I suspect the final value that is picked up to be the default one returned here. I don't have the time or means to debug it further however.

Tested version: 2.1.0-beta.11