File set (video only) download API route

[kdid]

Summary

• Adds /file-sets/{id}/download route
• Implemented for video only - bug for audio: https://github.com/nulib/repodev_planning_and_docs/issues/4266
• Separate issue: unit tests for Step function and lambda: https://github.com/nulib/repodev_planning_and_docs/issues/4267

Steps to test in developer environment

• Follow startup instructions here: Running the API locally with state machine + lambdas (needed for AV download route)
• Obtain the file set id for a video from your local Meadow environment.
• Obtain a superUser token from Meadow (dcApiToken query)
• Invoke GET https://USER_PREFIX.dev.rdc.library.northwestern.edu:3002/file-sets/{id}/download?email={youremailhere} with the Bearer Token
• Observe immediate response
• Monitor your email, click download link to obtain derivative video file
• You can test error states by not using a token or sending a file set id that does not exist or is an image, or omitting the email. ETC...

[mbklein]

• Can the logging maybe be changed to use the debug package? I'm happy to help with that since I've set it up in other places.
• Tests are failing for coverage reasons. Instead of lowering the minimum threshold, we should maybe use "ignore this file" tags at the top of the specific files, or configure the suite to ignore the /lambdas/ directory.

[bmquinn]

Looks great! 👍