API Feature Completion

# Still missing 

* [x] `misc.live` and `misc.ready`
* [x] `misc.oidc`
* [x] `misc.meta`
* [x] `data.references` (CRUD)
* [x] `data.validate`
* [x] `data.delete`
* [x] `graphql.aggregate` #4 
* [x] `c11y.concepts`
* [x] `c11y.upsertExtension`