release: consolidate web simulation and real CV prototype

Add cleaned RealSense/OpenCV CV under cv/ with secret-free example
config, MQTT disabled by default, and canonical README coverage for
web + CV relationship without claiming production integration.

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

cv/run.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -euo pipefail
+DIR="$(cd "$(dirname "$0")" && pwd)"
+cd "$DIR"
+
+if [[ ! -f config.yaml && -f config.example.yaml ]]; then
+  cp config.example.yaml config.yaml
+  echo "[cv] created config.yaml from config.example.yaml (MQTT disabled)"
+fi
+
+if [[ ! -d .venv ]]; then
+  python3 -m venv .venv
+  .venv/bin/pip install -U pip
+  .venv/bin/pip install -r requirements.txt
+fi
+
+exec .venv/bin/python main.py "$@"