Refactor LibraryService.__init__: too many parameters (S107)

[danielcopper]

Problem

LibraryService.__init__ has 14 parameters (self + 13 keyword-only), exceeding the S107 threshold of 13. This is a pre-existing issue, not a regression.

Suggested Fix

Group the three persistence/logging callbacks (save_state, save_settings_to_disk, log_debug) into a small config object or Protocol, reducing the param count by 2.

Alternatively, evaluate if some params can be consolidated or injected differently via bootstrap.

Area

Backend, Architecture