Fix duplicate FIX orders and lowercase side field

Two bugs found:
1. FIX UI client was publishing orders to Kafka directly AND via FIX
protocol to OEG (which also publishes to Kafka) = duplicate orders.
Removed the direct Kafka publish from FIX UI client.
2. FIX OEG used "type": "buy"/"sell" instead of "side": "BUY"/"SELL",
inconsistent with the rest of the system.

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

fix-ui-client/fix-ui-client.py

@@ -11,7 +11,6 @@ from collections import deque
 from threading import Lock
 
 from shared.config import Config
-from shared.kafka_utils import create_producer
 
 app = Flask(__name__)
 
@@ -50,7 +49,6 @@ class FixUIClientApp(fix.Application):
         super().__init__()
         self.sessionID = None
         self.connected = False
-        self.producer = create_producer(component_name="FIX-UI-Client")
 
     def onCreate(self, sessionID): self.sessionID = sessionID
     def onLogon(self, sessionID):
@@ -109,17 +107,6 @@ class FixUIClientApp(fix.Application):
 
         fix.Session.sendToTarget(order, self.sessionID)
         log(f"📤 Sent Order (ID={cl_ord_id}): {order.toString()}")
-        
-        # 🔥 Publish to Kafka
-        self.producer.send(Config.ORDERS_TOPIC,
-        {
-            "id": cl_ord_id,
-            "symbol": symbol,
-            "side": "buy" if side == "1" else "sell",
-            "qty": qty,
-            "price": price,
-            "timestamp": time.time(),
-        })
 
         return "Order sent!"
      

fix_oeg/fix_oeg_server.py

@@ -165,7 +165,7 @@ class Application(fix.Application):
             "order_id": order_id,
             "cl_ord_id": cl_ord_id,
             "symbol": symbol,
-            "type": "buy" if str(side_val) == "1" else "sell",
+            "side": "BUY" if str(side_val) == "1" else "SELL",
             "quantity": qty,
             "price": price,
             "timestamp": time.time(),