Wire watcher into CONFIG + load env in npm scripts

- npm start / watch:telegram: add --env-file=env so TELEGRAM_* and HTTPS_PROXY from nv reach process.env
- watcher: import CONFIG.candleWindowMinutes from src/config.js so the per-window latch stays in sync with the bot
- watcher: replace prevSide/cooldown latch with lastSentWindowId keyed on floor(ts/WINDOW_MS); one alert per window, NO_TRADE rows no longer reset state

package.json

@@ -4,8 +4,8 @@
   "type": "module",
   "private": true,
   "scripts": {
-    "start": "node src/index.js",
-    "watch:telegram": "node scripts/telegram-watcher.js"
+    "start": "node --env-file=env src/index.js",
+    "watch:telegram": "node --env-file=env scripts/telegram-watcher.js"
   },
   "dependencies": {
     "ethers": "^6.11.1",