Summary

Updates n_jobs docstrings for all 8 neighbors estimators, explaining that query samples are split across workers for parallel neighbor search, and listing which methods are affected:

• KNeighborsClassifier: predict, predict_proba, kneighbors, kneighbors_graph (not fit)
• KNeighborsRegressor: predict, kneighbors, kneighbors_graph (not fit)
• KNeighborsTransformer: transform, fit_transform
• RadiusNeighborsClassifier: predict, predict_proba, radius_neighbors, radius_neighbors_graph (not fit)
• RadiusNeighborsRegressor: predict, radius_neighbors, radius_neighbors_graph (not fit)
• RadiusNeighborsTransformer: transform, fit_transform
• NearestNeighbors: all four query methods (not fit)
• LocalOutlierFactor: notably does affect fit (computes neighbor distances for local reachability density), plus score_samples and predict when novelty=True

Also normalizes the Glossary reference for KNeighborsTransformer and RadiusNeighborsTransformer, which previously had a non-standard format.

Contributes to #14228.

Test plan

• Verify rendered docstrings render correctly
• Confirm no test regressions in sklearn/neighbors/tests/

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