Feature CPD-904: Include cycle_id in download file name

🗣 Description

Jira ticket: https://cset.atlassian.net/browse/CPD-904

Frontend changes: https://github.com/cisagov/con-pca-web/pull/387

Added cycle_id to the filename string when downloaded.

Added an optional argument so that cycle_id can be passed to the Email() function and then added to the filename string when reports are emailed.

💭 Motivation and context

Sometimes one wants to pull down and compare multiple cycle reports from the same subscription. If the reports have the exact same name, this is very inconvenient.

🧪 Testing

Please double check this one

✅ Pre-approval checklist

[x] This PR has an informative and human-readable title.
[x] Changes are limited to a single goal - eschew scope creep!
[x] All future TODOs are captured in issues, which are referenced in code comments.
[x] All relevant type-of-change labels have been added.
[x] I have read the CONTRIBUTING document.
[x] These code changes follow cisagov code standards.
[x] All relevant repo and/or project documentation has been updated to reflect the changes in this PR.
[ ] Tests have been added and/or modified to cover the changes in this PR.
[x] All new and existing tests pass.

✅ Pre-merge checklist

[ ] Revert dependencies to default branches.
[ ] Finalize version.

✅ Post-merge checklist

[ ] Add a tag or create a release.

cisagov / con-pca-api

Feature CPD-904: Include cycle_id in download file name #722