Expand moderator roles by adding SCOPE_mod permission and updating authorization logic.

open_api/src/main/resources/schemas/permissions/permissions.yml

@@ -2,7 +2,7 @@ components:
   schemas:
     PermissionClaim:
       type: string
-      enum: [ SCOPE_user, SCOPE_head_mod ]
+      enum: [ SCOPE_user, SCOPE_head_mod, SCOPE_mod ]
       description: Permission claims used for authorization
-      x-enum-varnames: [ USER, HEAD_MOD ]
+      x-enum-varnames: [ USER, HEAD_MOD, MOD ]
       x-enum-descriptions: [ "User permission", "Head moderator permission" ]