Bug Description

In index.js, the gfn function's success path (line 601) is missing a return statement, causing the handler to return undefined instead of the value from finalize().

Current Behavior

// Line 601 - success path (BUG):
await finalize(event, context, init, finalError, finalResult);

Expected Behavior

// Line 638 - error path (correct):
return await finalize(event, context, init, finalError, finalResult);

Impact

• TURBOT_TEST mode: The handler returns undefined instead of { result, turbot: processEvent }, breaking test assertions on turbot process events
• Production mode: Returns undefined instead of null (inconsistent with error path)

Fix

Add return before await finalize(...) on line 601.