Variable CHANNEL_SPEAKER_ALIGN_PATH`Const`

CHANNEL_SPEAKER_ALIGN_PATH: "/channel/{kind}/{index}/speakerAlign/{side}" = '/channel/{kind}/{index}/speakerAlign/{side}'

ONE LOUDSPEAKER's alignment reading — the output, and which SIDE of its leg the box hangs off (#845, per-leg spec amendment 2026-09-09). A stereo MAIN holds two: L and R.