Generate Hail import/export script [VS-605]

[mcovarr]

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[codecov]

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Additional details and impacted files

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[rsasch]

Just curious, why no last modified checks? Was it to keep the code simpler?

[mcovarr]

Just curious, why no last modified checks? Was it to keep the code simpler?

Mostly because I couldn't readily think of a scenario where I would actually want this to call cache, but I could easily imagine call caching leading to undesired clobbering of previously generated results. We can certainly revisit this decision if it turns out we're using the script in ways where we really would want call caching.

[rsasch]

LGTM 👍🏻 Only suggestion is to maybe change the comments explaining why the tasks are volatile from "there's no last modified check" to something like "we don't envision taking advantage of call caching at the moment".