fix(test): avoid JSON.stringify on OpenAPI schema in API assertion

OpenAPI schema objects can contain circular references after resolution.
JSON.stringify threw when formatting the assert message; use
util.inspect instead so failure output stays safe and readable.

Author: connorcarpenter15

test/api.js

@@ -700,7 +700,7 @@ describe('API', async () => {
 				return;
 			}
 
-			assert(schema[prop], `"${prop}" was found in response, but is not defined in schema (path: ${method} ${path}, context: ${context}), SCHEMA ${JSON.stringify(schema)}`);
+			assert(schema[prop], `"${prop}" was found in response, but is not defined in schema (path: ${method} ${path}, context: ${context}), SCHEMA ${util.inspect(schema, { depth: 2, maxArrayLength: 20 })}`);
 		});
 	}
 });