Upgrade the SQS Message Limit to 1 MB

[dhwaneetbhatt]

SQS upgraded the message limits to 1 MB from 256 KB in August 2025. Here is the announcement: https://aws.amazon.com/about-aws/whats-new/2025/08/amazon-sqs-max-payload-size-1mib/. But this library still uses 256 KB as the limit.

[reech-martin]

It's been one year since the announcement, is this repo still maintained? If not, please archive it or hand it to the community.