BREAKING CHANGE: The 'scene_naming' config option has been removed.
Users must configure 'output_template' in unshackle.yaml with movies, series, and songs templates. See unshackle-example.yaml for examples.
Title filenames now include resolution/service/WEB-DL/codecs/HDR tokens in both modes; scene_naming only changes the spacer ('.' vs ' ').
Also avoid overwriting muxed outputs by disambiguating on collision (append codec suffix when needed, then a numeric suffix).