AudioGraphLrPhaseCorrect

Manual L/R phase corrector: per-channel polarity + signed inter-channel skew. invert_left / invert_right flip that channel (fixes a ~180-degree polarity fault). skew_ms delays one channel to line the pair back up in time: > 0 delays the right channel, < 0 delays the left (whole-sample delay, latency = |skew|). corr_window_ms > 0 emits a correlation reading of the CORRECTED output every window (0 = off) for operator feedback. All three controls are live via setParams (invert_left / invert_right as 0/1, skew_ms). Only channels 0/1 (L/R) are touched; further channels pass through.