on_compression_completed property Leave feedback

The event handler for compression completed.

Honored for back‑compat: the value is merged into the internal events bag at Converter construction and is overridden if ConversionEvents.on_compression_completed is also set on the events constructor parameter.

@property
def on_compression_completed(self):
    ...
@on_compression_completed.setter
def on_compression_completed(self, value):
    ...

• class ConverterSettings