[mnoszczak]

LabelVersion now has created_by_email, so you can see who submitted or approved without listing every organization user and mapping the IDs yourself. John Bullock hit this while checking an Airbnb data row: he had to build {u.uid: u.email for u in org.users()}.

• The SDK now selects createdBy { email }, which the public LabelVersion type has had since Labelbox/intelligence#31624. No API change is needed. The original E2E for that PR read reviewer emails through the same field.
• The email is @classified, so it is masked the way user emails always are between a workforce provider and the organizations it works for. If the user can't be read, it is None.
• Project.label_versions() docstring: a review decision on a whole data row records one version per label on it, all with the same time and reviewer. Filtering by data_row on a row with three labels therefore returns three APPROVED versions. The example now prints label_id, so those don't look like duplicates.

>>> for v in project.label_versions(data_row=data_row_id, include_annotations=False):
...     print(v.label_id, v.action, v.created_by_email, v.stage and v.stage.name)

Tests: tests/unit/schema/test_label_version.py (17 passed); ruff and mypy are clean on the changed files.

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