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

lib/trading/position-manager.ts

@@ -155,10 +155,23 @@ export class PositionManager {
   /**
    * Remove a trade from monitoring
    */
-  removeTrade(tradeId: string): void {
+  async removeTrade(tradeId: string): Promise<void> {
     const trade = this.activeTrades.get(tradeId)
     if (trade) {
       console.log(`🗑️ Removing trade: ${trade.symbol}`)
+      
+      // Cancel all orders for this symbol (cleanup orphaned orders)
+      try {
+        const { cancelAllOrders } = await import('../drift/orders')
+        const cancelResult = await cancelAllOrders(trade.symbol)
+        if (cancelResult.success && cancelResult.cancelledCount! > 0) {
+          console.log(`✅ Cancelled ${cancelResult.cancelledCount} orphaned orders`)
+        }
+      } catch (error) {
+        console.error('❌ Failed to cancel orders during trade removal:', error)
+        // Continue with removal even if cancel fails
+      }
+      
       this.activeTrades.delete(tradeId)
       
       // Stop monitoring if no more trades
@@ -474,7 +487,7 @@ export class PositionManager {
           }
         }
         
-        this.removeTrade(trade.id)
+        await this.removeTrade(trade.id)
         console.log(`✅ Position closed | P&L: $${trade.realizedPnL.toFixed(2)} | Reason: ${reason}`)
       } else {
         // Partial close (TP1)