✨ Enable curating multiple categorical features per artifact against the same label registry

[falexwolf]

The Curator hadn't yet understood a case where two categoricals map against the same registry.

Now the following works.

ln.Curator.from_anndata(
    adata,
    categoricals={"cell_type1": bt.CellType.name, "cell_type2": bt.CellType.name},
)

This PR resolves this issue:

• https://github.com/laminlabs/lamindb/issues/2076

There is a test case in the unit tests and here in the usecases docs:

• https://github.com/laminlabs/lamin-usecases/pull/166

Needs:

• https://github.com/laminlabs/lnschema-core/pull/443
• https://github.com/laminlabs/bionty/pull/133

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 86.95652% with 3 lines in your changes missing coverage. Please review.

Project coverage is 92.60%. Comparing base (80fb3b0) to head (0d52349). Report is 23 commits behind head on main.

Files with missing lines	Patch %	Lines
lamindb/core/_data.py	57.14%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2080 +/- ## ========================================== + Coverage 92.39% 92.60% +0.20% ========================================== Files 54 54 Lines 6341 6419 +78 ========================================== + Hits 5859 5944 +85 + Misses 482 475 -7 ```

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[github-actions[bot]]

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