onboard audio: JMISC HPH wiring, UCM fix, update scripts for git deploy

scripts/on-usb-role-change.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+# on-usb-role-change.sh — Called by udev on USB role/connect events.
+# Re-detects role, stops/restarts Pd with appropriate config.
+
+set -euo pipefail
+
+ROLE_FILE="/run/usb-role"
+LOG_TAG="[USB-HOTPLUG]"
+
+# Debounce: skip if we just ran (within 3s)
+LOCK="/tmp/usb-role-change.lock"
+if [ -f "$LOCK" ]; then
+    age=$(($(date +%s) - $(stat -c %Y "$LOCK" 2>/dev/null || echo 0)))
+    [ "$age" -lt 3 ] && exit 0
+fi
+touch "$LOCK"
+
+logger -t "$LOG_TAG" "USB role change event — re-detecting..."
+
+/usr/local/bin/detect-usb-role.sh
+
+# Restart Pd if it's running
+if systemctl is-active pd-synth-auto &>/dev/null; then
+    logger -t "$LOG_TAG" "Restarting Pd with new role"
+    systemctl restart pd-synth-auto
+fi