fix: resolve Bybit Hedge Mode position idx error by adding positionIdx and settleCoin

src/strategies/ping_pong_bot.py

@@ -152,7 +152,8 @@ class PingPongBot:
             # Get Position
             pos_response = self.session.get_positions(
                 category="linear",
-                symbol=self.symbol
+                symbol=self.symbol,
+                settleCoin="USDT"
             )
             
             if pos_response['retCode'] == 0:
@@ -295,6 +296,9 @@ class PingPongBot:
         else:
             side = "Buy" if is_close else "Sell"
             
+        # Hedge Mode Index: 1 for Long, 2 for Short
+        pos_idx = 1 if self.direction == "long" else 2
+            
         try:
             response = self.session.place_order(
                 category="linear",
@@ -303,7 +307,8 @@ class PingPongBot:
                 orderType="Market",
                 qty=str(qty),
                 timeInForce="GTC",
-                reduceOnly=is_close
+                reduceOnly=is_close,
+                positionIdx=pos_idx
             )
             
             if response['retCode'] == 0: