Add standalone approve-sensors script

Creates a wrapper that sets minimal env vars so the tool
can run without full MQTT configuration.

scripts/approve-sensors.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+# Wrapper script for approve-sensors that sets minimal required env vars
+
+# Get script directory
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+PROJECT_ROOT="$( cd "$SCRIPT_DIR/.." && pwd )"
+
+# Set minimal required environment variables
+export MQTT_HOST="${MQTT_HOST:-localhost}"
+export MQTT_PORT="${MQTT_PORT:-1883}"
+
+# Load actual config if it exists (will override defaults)
+if [ -f "$PROJECT_ROOT/config/sensorpajen.env" ]; then
+    set -a
+    source "$PROJECT_ROOT/config/sensorpajen.env"
+    set +a
+fi
+
+# Activate virtual environment
+source "$PROJECT_ROOT/.venv/bin/activate"
+
+# Run the approve-sensors command
+python -m sensorpajen.approve_sensors "$@"