Since much of the code was already using smart_open, the replacement here that uses boto3 has the same semantics as smart_open: an open function that switches between filesystem and s3 based on scheme.
To showcase this, there is a new endpoint test that does the while flow (uploading and merging) without mocking s3 at all to prove that it works.
Introduce open_sesame to switch between s3 and filesystem
Change references to 's3' in code to 'storage'
Add bookings merge test that uses filesystem storage
Since much of the code was already using smart_open, the replacement here that uses boto3 has the same semantics as smart_open: an open function that switches between filesystem and s3 based on scheme.
To showcase this, there is a new endpoint test that does the while flow (uploading and merging) without mocking s3 at all to prove that it works.