fix: update API routes for sniffer and bridge operations for consistency

backend/src/network_sniffer.py

@@ -127,7 +127,7 @@ def handle_packet(pkt, bridge: str):
         "dst_ip": pkt[IP].dst if IP in pkt else None,
         "protocol": pkt[IP].proto if IP in pkt else None,
         "length": len(pkt),
-        "raw": bytes(pkt)
+        "raw": pkt.json()
     }
 
     asyncio.run_coroutine_threadsafe(db_insert_packet(pkt_info), async_loop)