feat: maker rebate MM — HFT market-making with spread capture on 15m markets

- Place simultaneous maker limit BUY on YES+NO sides (combined ≈ $0.98)
- Merge filled pairs via CTF contract → capture spread as profit
- WebSocket RTDS real-time fill detection + onchain balance as source of truth
- No aggressive repricing when one side is filled (prevents double exposure)
- Stop re-entry after one-sided stuck cycle (prevents directional accumulation)
- Combined cap always enforced — profitable merge guaranteed
- Auto-queue next market before current closes (zero idle time)
- Remove loss-compensating martingale logic from reprice flow
- Add .env.example with full documentation for all strategies
- Update README with grant-ready project description

package.json

@@ -22,6 +22,10 @@
     "sniper-tui": "DRY_RUN=false node src/sniper-tui.js",
     "sniper-tui-sim": "DRY_RUN=true node src/sniper-tui.js",
     "sniper-tui-dev": "DRY_RUN=true nodemon --ignore 'data/*.json' src/sniper-tui.js",
+    "maker-mm": "DRY_RUN=false node src/maker-mm.js",
+    "maker-mm-sim": "DRY_RUN=true node src/maker-mm.js",
+    "maker-mm-bot": "node src/maker-mm-bot.js",
+    "maker-mm-bot-sim": "DRY_RUN=true node src/maker-mm-bot.js",
     "postinstall": "node scripts/patch-clob-client.cjs"
   },
   "keywords": [