feat: check role assignment

queries/roles.sql

@@ -53,6 +53,11 @@ INSERT INTO roles (name, scope, description)
 VALUES ($1, $2, $3)
 RETURNING *;
 
+-- name: GetRoleAssignment :one
+SELECT * FROM role_permissions
+WHERE role_id = $1 AND permission_id = (SELECT id FROM permissions p WHERE p.scope = split_part(sqlc.arg('key'), '_', 1) AND p.name = right(sqlc.arg('key'), length(sqlc.arg('key')) - position('_' IN sqlc.arg('key'))))
+LIMIT 1;
+
 -- name: AssignRolePermission :exec
 INSERT INTO role_permissions (role_id, permission_id)
 VALUES (