Add catalog prices for the radar parts and scripts that bring Overwatch up.

The cost note can now be added from published distributor prices, and a fresh checkout can install its environment and start the stack without hand-written paths.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/start_stack.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# Bring up Overwatch: auth stack, operator UI, and the simulation backend.
+set -Eeuo pipefail
+
+ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
+SIM="${ROOT}/simulation"
+
+if [[ ! -x "${SIM}/.venv/bin/python" || ! -d "${SIM}/frontend/node_modules" ]]; then
+  "${ROOT}/scripts/setup_environment.sh"
+fi
+
+exec "${SIM}/rebuild_restart.sh"