Fix ZMQ socket monitor leak and guard monitor recv against races

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <[email protected]>

lib/network.py

@@ -9,6 +9,8 @@ import struct
 import logging
 import time
 
+from .constants import STATS_CONNECTION_DELAY
+
 logger = logging.getLogger('network')
 
 
@@ -37,11 +39,11 @@ def check_monitor(monitor):
     """Check monitor socket for events"""
     try:
         event_monitor = monitor.recv(zmq.NOBLOCK)
+        event_id, event_name, event_value = read_socket_event(event_monitor)
+        event_endpoint = monitor.recv(zmq.NOBLOCK)
     except zmq.Again:
         return None
 
-    event_id, event_name, event_value = read_socket_event(event_monitor)
-    event_endpoint = monitor.recv(zmq.NOBLOCK)
     logger.debug(f'Monitor: {event_name} {event_value} endpoint {event_endpoint}')
     return (event_id, event_value)
 
@@ -104,6 +106,9 @@ class RconConnection:
 
     def close(self):
         """Close connection"""
+        if self.monitor:
+            self.monitor.setsockopt(zmq.LINGER, 0)  # Don't wait for unsent messages
+            self.monitor.close()
         if self.socket:
             self.socket.setsockopt(zmq.LINGER, 0)  # Don't wait for unsent messages
             self.socket.close()
@@ -143,7 +148,7 @@ class StatsConnection:
         logger.debug('Setting ZMQ_SUBSCRIBE to empty (all messages)')
         self.socket.setsockopt(zmq.SUBSCRIBE, b'')
 
-        time.sleep(0.5)
+        time.sleep(STATS_CONNECTION_DELAY)
         self.connected = True
         logger.info('Stats stream connected')