Lambda code for compaction job dispatch

[patchwork01]

Background

Split from:

• Pending job batch queue for compaction job creation #3678

Follows on from:

• Logic for compaction job dispatch #3688

Description

We'd like to create the lambda handler method to be called on an invocation to dispatch a batch of pending compaction jobs.

Analysis

This will use the logic from the previous issue, and wire in SQS code to perform the operations to return a job to the queue.

We could potentially add integration tests for this at the level of the lambda, replicating a simplified scenario equivalent to the unit tests for the logic.

We can add this to the compaction-job-creation-lambda module.

We will follow up to deploy this as a separate issue.