Add PD to Serenity backup automation scaffolding

automation/bin/pd_backup_sync_to_serenity.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+# shellcheck disable=SC1091
+source "$SCRIPT_DIR/pd_backup_lib.sh"
+
+ssh_opts="$(ssh_args)"
+remote_root="$SERENITY_BACKUP_HOST:$SERENITY_BACKUP_ROOT"
+
+# shellcheck disable=SC2086
+ssh $ssh_opts "$SERENITY_BACKUP_HOST" mkdir -p \
+  "$SERENITY_BACKUP_ROOT/appdata" \
+  "$SERENITY_BACKUP_ROOT/databases" \
+  "$SERENITY_BACKUP_ROOT/tank-docker" \
+  "$SERENITY_BACKUP_ROOT/db-dumps"
+
+rsync_cmd=(
+  rsync -a --delete
+  --exclude '*.sqlite-journal'
+  --exclude '*.db-journal'
+  --exclude '*.sqlite-wal'
+  --exclude '*.db-wal'
+  --exclude '*.tmp'
+)
+rsync_cmd+=( -e "$(ssh_cmd)" )
+
+run_rsync() {
+  local label="$1"
+  shift
+  echo "$label"
+  set +e
+  "${rsync_cmd[@]}" "$@"
+  local rc=$?
+  set -e
+  if [[ $rc -eq 24 ]]; then
+    echo "rsync completed with vanished-file warning (code 24); treating as acceptable for live appdata."
+    return 0
+  fi
+  return $rc
+}
+
+run_rsync "Syncing appdata to Serenity" "$PD_APPDATA_ROOT/" "$remote_root/appdata/"
+
+run_rsync "Syncing database volume roots to Serenity" "$PD_DATABASES_ROOT/" "$remote_root/databases/"
+
+run_rsync "Syncing selected tank docker data to Serenity" "$PD_TANK_DOCKER_ROOT/" "$remote_root/tank-docker/"
+
+run_rsync "Syncing DB dumps to Serenity" "$PD_DB_DUMP_ROOT/" "$remote_root/db-dumps/"
+
+echo "Serenity sync complete: $remote_root"