Y24-061: Send Pool XP export message

[sdjmchattie]

Closes #4085

Changes proposed in this pull request

• Extract code for creating compound samples.
• Build an endpoint and job that will create an export message.
• Encode the message with Avro and publish it to RabbitMQ.

Instructions for Reviewers

[All PRs] - Confirm PR template filled
[Feature Branches] - Review code

[codeclimate[bot]]

Code Climate has analyzed commit 2a714b40 and detected 19 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	19

The test coverage on the diff in this pull request is 97.2% (50% is the threshold).

This pull request will bring the total coverage in the repository to 86.7% (0.1% change).

View more on Code Climate.