feat: Instrument Snapshot Dashboard — 5-layer synchronized view for 20 instruments

- 20 instruments configured (equity indices, metals, energy, bonds, FX, stocks, crypto)
  each with custom drivers, regime labels, MA periods, event keywords, ai_context
- InstrumentChart: TradingView lightweight-charts candlesticks + MA lines + Bollinger
  + volume histogram + macro event markers overlaid on price
- InstrumentDashboard: regime detection card (scores + signals), trend indicators
  (RSI gauge, MA slopes, momentum, 52W range), events card (links to Timeline),
  AI narrative via GPT-4o-mini (cached by day)
- Backend: instrument_service (OHLCV fetch, indicators, regime scoring, GPT narrative)
  + /api/instruments router (3 endpoints)
- Route: /instruments/:id with selector dropdown, period buttons (3M/6M/1Y/2Y/5Y)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/package.json

@@ -9,16 +9,17 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@tanstack/react-query": "^5.59.0",
+    "axios": "^1.7.7",
+    "clsx": "^2.1.1",
+    "date-fns": "^4.1.0",
+    "lightweight-charts": "^4.2.3",
+    "lucide-react": "^0.447.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-router-dom": "^6.26.2",
     "recharts": "^2.13.0",
-    "@tanstack/react-query": "^5.59.0",
-    "zustand": "^5.0.0",
-    "axios": "^1.7.7",
-    "date-fns": "^4.1.0",
-    "lucide-react": "^0.447.0",
-    "clsx": "^2.1.1"
+    "zustand": "^5.0.0"
   },
   "devDependencies": {
     "@types/react": "^18.3.11",