fix: include enum options for array values in OpenAPI spec

[nathanaelhoun]

The enum values for an array query parameter are correctly identified in the Scribe documentation, but are not shown in the generated OpenAPI document.

This PR adds to the enum values for the array query parameter in the OpenAPI document.

Before / After OpenAPI document

Before

     parameters:
       -
         in: query
         name: type
         description: 'Filtre sur le type'
         example:
           - fichier
         required: false
         schema:
           type: array
           description: 'Filtre sur le type'
           example:
             - fichier
           items:
             type: string

After

 parameters:
        -
          in: query
          name: type
          description: 'Filtre sur le type'
          example:
            - fichier
          required: false
          schema:
            type: array
            description: 'Filtre sur le type'
            example:
              - fichier
            items:
              type: string
              enum:
                - app
                - app_inst
                - bdd
                - fichier
                - rpa
                - monarch