Allow one to set a custom progress callback (#2609)

ming030890

2025-08-05 b3fb4c0acd5f52a313f024b6f69b8f025c6eddfe

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p m    p.m.
pm    p.m.
p.m.
p.m    p.m.
am    a.m.
a.m.
a.m    a.m.
a m    a.m.