Process DynamoDB streams data through Lambda to Firehose. This is an alternative to setting up a Kinesis Stream, which incurs per hour costs.
Based on code from: awslabs/lambda-streams-to-firehose
This rewrite reduces scope, adds typing, and modernises. It was written as part of a larger project. See here for an example of packaging and deploying: https://github.com/ae9is/anything/tree/main/packages/infra/data
A lot was changed, make sure to review and test to see that it does what you want!