feat(powerman): add remote query script for workstation PDU access

Script for any Tailscale-connected workstation to install the powerman
client and query the Cyclades PDU on pfv-tsys1. Sets POWERMAN_SERVER so
all powerman commands route to the remote daemon. Handles missing sudo
gracefully with instructions for manual install.

💘 Generated with Crush

Assisted-by: Crush:glm-5.2

powerman/query-remote.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/bash
+#
+# powerman/query-remote.sh — install powerman client locally and query
+# the Cyclades PDU running on pfv-tsys1 over Tailscale.
+#
+set -euo pipefail
+
+REMOTE_HOST="${REMOTE_HOST:-pfv-tsys1}"
+REMOTE_PORT="${REMOTE_PORT:-10101}"
+
+echo "============================================"
+echo "  Powerman Remote PDU Query"
+echo "  Server: ${REMOTE_HOST}:${REMOTE_PORT} (Tailscale)"
+echo "============================================"
+
+# --- 1. Install powerman client if missing ---
+if ! command -v powerman >/dev/null 2>&1; then
+  echo ""
+  echo "--- Installing powerman client ---"
+  if sudo -n true 2>/dev/null; then
+    sudo apt-get update -qq && sudo apt-get install -y -qq powerman
+  else
+    echo "  Passwordless sudo not available. Please run this command in a terminal:"
+    echo ""
+    echo "    sudo apt-get update && sudo apt-get install -y powerman"
+    echo ""
+    echo "  Then re-run this script."
+    exit 1
+  fi
+else
+  echo "  powerman client already installed."
+fi
+
+# --- 2. Verify connectivity ---
+echo ""
+echo "--- Connectivity check ---"
+if timeout 3 bash -c "echo > /dev/tcp/${REMOTE_HOST}/${REMOTE_PORT}" 2>/dev/null; then
+  echo "  [OK] ${REMOTE_HOST}:${REMOTE_PORT} reachable"
+else
+  echo "  [FAIL] Cannot reach ${REMOTE_HOST}:${REMOTE_PORT}"
+  echo "  Is Tailscale up? Is powermand running on ${REMOTE_HOST}?"
+  exit 1
+fi
+
+export POWERMAN_SERVER="${REMOTE_HOST}:${REMOTE_PORT}"
+
+# --- 3. List outlets ---
+echo ""
+echo "--- Outlets ---"
+powerman -l
+
+# --- 4. Query status ---
+echo ""
+echo "--- Status ---"
+powerman -q
+
+echo ""
+echo "============================================"
+echo "  Done."
+echo ""
+echo "  To control an outlet from this workstation:"
+echo "    POWERMAN_SERVER=${REMOTE_HOST}:${REMOTE_PORT} powerman -0 outlet-10  # off"
+echo "    POWERMAN_SERVER=${REMOTE_HOST}:${REMOTE_PORT} powerman -1 outlet-10  # on"
+echo "    POWERMAN_SERVER=${REMOTE_HOST}:${REMOTE_PORT} powerman -c outlet-10  # cycle"
+echo "============================================"