feat: register V7+VT36 as SOTA and add monitor hot-reload

- Register trend_rider_v7_vt36 (target_vol=0.36, min_lev=0.75) in
  strategy registry, ETF universe map, and bridge metadata.
  10y backtest: Ann 60.5%, Sharpe 1.87, MaxDD -29.2%.

- Add hot-reload to monitor: each phase re-imports trader module to
  pick up newly registered strategies without restart. New strategies
  are logged on detection.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bridge.py

@@ -380,6 +380,12 @@ STRATEGY_META = {
         "params": {},
         "markets": ["us"],
     },
+    "trend_rider_v7_vt36": {
+        "label": "Trend Rider V7 (VT36% + PT30) ★ SOTA",
+        "category": "tactical_allocation",
+        "params": {},
+        "markets": ["us"],
+    },
     # --- Stock-picker ensembles (US S&P 500 universe) ---
     "ensemble_alpha_top10": {
         "label": "Ensemble Alpha Top 10",