fix: suppress noisy WebSocket errors and prevent race conditions in example

- Added logging configuration to suppress SignalR WebSocket errors
- Added small delays between suite disconnections to prevent cleanup races
- Improved error handling in session statistics section
- Makes example output much cleaner and more readable

The WebSocket errors were harmless but made the output noisy and confusing.
They occurred when background threads tried to read from already-closed connections
after successful data retrieval and disconnection.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: TexasCoding

examples/16_eth_vs_rth_sessions_demo.py

@@ -14,12 +14,16 @@
 """
 
 import asyncio
+import logging
 from datetime import datetime, timedelta
 
 from project_x_py import TradingSuite
 from project_x_py.indicators import EMA, RSI, SMA, VWAP
 from project_x_py.sessions import SessionConfig, SessionFilterMixin, SessionType
 
+# Suppress noisy WebSocket connection errors from SignalR
+logging.getLogger("SignalRCoreClient").setLevel(logging.CRITICAL)
+
 
 async def demonstrate_basic_session_usage():
     """Basic session configuration and usage."""
@@ -101,6 +105,7 @@ async def demonstrate_historical_session_analysis():
             print(f"ETH Time Range: {eth_start} to {eth_end}")
 
         await rth_suite.disconnect()
+        await asyncio.sleep(0.1)  # Brief delay to avoid connection cleanup race
         await eth_suite.disconnect()
         print("\n✅ Historical session analysis completed")
 
@@ -175,6 +180,7 @@ async def demonstrate_session_indicators():
                         print(f"  Difference: ${abs(eth_sma_mean - rth_sma_mean):.2f}")
 
         await suite.disconnect()
+        await asyncio.sleep(0.1)  # Brief delay to avoid connection cleanup race
         print("\n✅ Session-aware indicators demonstrated")
 
     except Exception as e:
@@ -218,6 +224,7 @@ async def demonstrate_session_statistics():
             print("This is expected if no recent session data is available")
 
         await suite.disconnect()
+        await asyncio.sleep(0.1)  # Brief delay to avoid connection cleanup race
         print("\n✅ Session statistics demonstrated")
 
     except Exception as e:
@@ -282,6 +289,7 @@ async def count_rth_events(event):
         print(f"Quotes: {event_counts['quote']}")
 
         await suite.disconnect()
+        await asyncio.sleep(0.1)  # Brief delay to avoid connection cleanup race
         print("\n✅ Real-time session filtering demonstrated")
 
     except Exception as e: