1d light curve collation utility function

[SamSandwich07]

Introduces collate_utils.py to put utility functions for collation. Adds one such utility function which can be used to pad and mask raw 1D light curves, along with a test for this function.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.87%. Comparing base (61d4977) to head (17c9961).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #951      +/-   ##
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+ Coverage   63.80%   63.87%   +0.07%     
==========================================
  Files          74       75       +1     
  Lines        7689     7704      +15     
==========================================
+ Hits         4906     4921      +15     
  Misses       2783     2783              

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[mtauraso]

Generally this seems alright to merge. I worry that it is not generic enough to be generally useful (but perhaps I simply haven't been part of the discussions here)

I'm lightly suggesting that we try to talk to folks who would use these collation utilities and try to generalize this, add documentation and examples so we get the full value here. I think a lot of this is human conversational/requirements gathering work, likely leading to a relatively small amount of new code. Not sure if we're on that path yet, but it seems like one we should consider.

[drewoldag]

Seems fine to me. I can imagine that users might want to be able to specify a max length as well. To either truncate all light curves with length greater than X, or to ensure that all light curves have length X even if the max in the batch is <X.

Regardless this is a nice jumping off point for people.

[drewoldag]

Suggested change

	`<field>_length` - int64 array (batch) of true light curve lengths
	`<field>_lengths` - int64 array (batch) of true light curve lengths