✨ Enable to easily join features onto artifacts via Artifact.df()

[falexwolf]

Summary

You can now easily join features onto the Artifact registry.

We find the features from the schema definition, independent of whether they are used as observation-level or dataset-level metadata.

ln.Feature(name="cell_medium", dtype="cat[ULabel]").save()
ln.Feature(name="cell_type_by_expert", dtype="cat[bionty.CellType]").save()
ln.Feature(name="cell_type_by_model", dtype="cat[bionty.CellType]").save()
ln.Feature(name="temperature", dtype="float").save()
ln.Feature(name="study", dtype="cat[ULabel]").save()
ln.Feature(name="date_of_study", dtype="date").save()
ln.Feature(name="study_note", dtype="str").save()

Here is another screenshot, scrolling the table further to the right.

More changes.

• QuerySet.df(include=[...]) now relies on .annotate() instead of pandas for simple join on Django fields -- this always performs an "outer join", and hence the join argument got removed
• ln.view(df) displays a DataFrame with types in the columns

Docs changes

Overhauled the registries guide.

Before	After
	Better section names
First impression was on generating "toy data"	The first impression is now on a "Get an overview" section
/	The guide now leverages small_dataset1 and small_dataset2 as many tests & the quickstart
/	It's documented how to include fields from other registries and these start at position 3 in the columns
/	You can now easily join features onto the Artifact registry

Materials

Needs:

• https://github.com/laminlabs/lndocs/pull/111
• 💄 Prettify Artifact field sequence and docs lnschema-core#462

[codecov]

Codecov Report

Attention: Patch coverage is 95.21277% with 9 lines in your changes missing coverage. Please review.

Project coverage is 92.94%. Comparing base (c54f99f) to head (66045c9).
Report is 17 commits behind head on main.

Files with missing lines	Patch %	Lines
lamindb/_query_set.py	95.58%	6 Missing ⚠️
lamindb/_view.py	95.45%	2 Missing ⚠️
lamindb/_feature.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2238      +/-   ##
==========================================
+ Coverage   92.36%   92.94%   +0.57%     
==========================================
  Files          54       54              
  Lines        6566     6818     +252     
==========================================
+ Hits         6065     6337     +272     
+ Misses        501      481      -20     

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[github-actions]

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