Seo module crashing whole GraphQL schema

[tropcicstefan]

Describe the bug

When done activating OrchardCore.Seo feature whole GraphQL schema will crash and be unusable. Because of way MediaField in SeoMetaQueryObjectType is resolved

To Reproduce

Steps to reproduce the behavior:

1. site with headless recipe
2. go to graphi, everything works
3. activate seo feature
4. go to graphi
5. exception

[gvkries]

The problem is that GraphQL types are registered as scoped in DI and those cannot be resolved while the schema is build as a singleton. I think the fix is to make them transient instead, but I'm not fully sure about the implications.

[gvkries]

Note that this also caused CustomUserSettings types with a media field to break the schema.