docs: new root as prior history lost (orphan + GC); ~215 commits not recoverable

scripts/taler-wallet-cli/goa-deb-withdraw-pay.sh

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+#!/bin/sh
+# Debian/Ubuntu · same as bank landing deb pane (install + run)
+set -eu
+
+# install (deb.taler.net · trixie): keyring, apt source, packages
+if ! command -v taler-wallet-cli >/dev/null 2>&1; then
+  sudo mkdir -p /etc/apt/keyrings && \
+  sudo wget -q -O /etc/apt/keyrings/taler-systems.gpg https://taler.net/taler-systems.gpg && \
+  echo 'deb [signed-by=/etc/apt/keyrings/taler-systems.gpg] https://deb.taler.net/apt/debian trixie main' | sudo tee /etc/apt/sources.list.d/taler.list && \
+  sudo apt-get update && sudo apt-get install -y taler-wallet-cli wget
+fi
+command -v wget >/dev/null 2>&1 || sudo apt-get install -y wget
+
+# private wallet DB under /tmp (not the default home DB)
+tw() {
+  taler-wallet-cli \
+    --wallet-db="${TMPDIR:-/tmp}/taler-wallet-goa.sqlite3" \
+    --no-throttle "$@"
+}
+
+# mint from bank, register exchange, withdraw GOA:10
+wget -q -O demo-withdraw.json https://bank.hacktivism.ch/intro/demo-withdraw.json && \
+tw exchanges add https://exchange.hacktivism.ch/ && \
+tw exchanges accept-tos https://exchange.hacktivism.ch/ && \
+tw withdraw accept-uri --exchange https://exchange.hacktivism.ch/ \
+  "$(grep -o 'taler://[^"]*' demo-withdraw.json)" && \
+tw run-until-done && \
+
+# pay orbit-sticker (GOA:2); balance ends at GOA:8
+tw handle-uri --yes \
+  taler://pay-template/taler.hacktivism.ch/instances/goa-shop/orbit-sticker && \
+tw run-until-done && tw balance