Endpoints: Add key permission checker

This is a definite way to check if an authorized key is API or admin.
The endpoint only runs if the key is valid in the first place to keep
inline with the API's security model.

Signed-off-by: kingbri <bdashore3@proton.me>

endpoints/OAI/types/auth.py

@@ -0,0 +1,7 @@
+"""Types for auth requests."""
+
+from pydantic import BaseModel
+
+
+class AuthPermissionResponse(BaseModel):
+    permission: str