fix (provider/gateway): add missing warning types for video response parsing

[shaper]

Background

The gateway video model was missing support for certain warning types in the response parsing schema, specifically for 'unsupported' and 'compatibility' warnings. This limited the ability to properly handle and display these warning types when they were returned from providers.

Summary

Added support for additional warning types in the gateway video model response parsing:

• Added 'unsupported' warning type with feature and optional details fields
• Added 'compatibility' warning type with feature and optional details fields
• Updated the schema to use a discriminated union for proper type validation
• Added tests to verify the correct handling of these new warning types

Checklist

• Tests have been added / updated (for bug fixes / features)
• A patch changeset for relevant packages has been added (for bug fixes / features - run pnpm changeset in the project root)
• I have reviewed this pull request (self-review)

Related Issues

Fixes an issue where 'unsupported' and 'compatibility' warnings from video providers weren't properly handled by the gateway.

[shaper]

• fix (provider/gateway): add missing warning types for video response parsing #12474 👈 (View in Graphite)
• main

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