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MNT Use pyrefly instead of mypy for type-checking (#34527)
FEA Implement classical MDS (#31322)
MNT Switch to absolute imports in sklearn/manifold/_barnes_hut_tsne.pyx (#32387)
Enable config setting `sparse_interface` to control sparray and spmatrix creation (#31177)
MNT Clean up deprecations for 1.9: default n_init in MDS (#33595)
EFF improve the eigsh call in spectral embedding (#33262)
MNT: Fix CI for cython-lint 0.21 (#34359)
BLD Reduce generated build file path lengths to avoid Windows path length limitation (#31212)