When a non-original audio language is the default (via muxing.default_language or sort order), the filename audio codec/channel fields still reflect the title's original-language track instead of whichever track appears first in the muxed MKV.
The {atmos?} placeholder checked only the first MediaInfo audio track, so a mux with a non-Atmos dub listed first dropped the Atmos tag from the filename even when another track carried JOC. Scan all audio tracks instead.
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.
