Exploring sync and async invocation logs

You are a junior DevOps engineer at DataStream Corp. Your team manages two Lambda functions: sync-order-api (invoked synchronously via API Gateway) and async-image-processor (triggered asynchronously by S3 upload events). A teammate reports that one function returns errors directly to callers while the other retries failed events automatically behind the scenes. Your task is to invoke both functions and explore their CloudWatch Logs to understand how synchronous and asynchronous invocations differ.