Add /close command and auto-flip logic with order cleanup

- Added /close Telegram command for full position closure
- Updated /reduce to accept 10-100% (was 10-90%)
- Implemented auto-flip logic: automatically closes opposite position when signal reverses
- Fixed risk check to allow opposite direction trades (signal flips)
- Enhanced Position Manager to cancel orders when removing trades
- Added startup initialization for Position Manager (restores trades on restart)
- Fixed analytics to show stopped-out trades (manual DB update for orphaned trade)
- Updated reduce endpoint to route 100% closes through closePosition for proper cleanup
- All position closures now guarantee TP/SL order cancellation on Drift

instrumentation.ts

@@ -0,0 +1,18 @@
+/**
+ * Next.js Instrumentation Hook
+ * 
+ * This file is automatically called when the Next.js server starts
+ * Use it to initialize services that need to run on startup
+ */
+
+export async function register() {
+  if (process.env.NEXT_RUNTIME === 'nodejs') {
+    console.log('🎯 Server starting - initializing services...')
+    
+    // Initialize Position Manager to restore trades from database
+    const { initializePositionManagerOnStartup } = await import('./lib/startup/init-position-manager')
+    await initializePositionManagerOnStartup()
+    
+    console.log('✅ Server initialization complete')
+  }
+}