Fix for Empty except (#821)

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: Andrey1994

emulator/brainflow_emulator/biolistener_emulator.py

@@ -166,8 +166,10 @@ def run(self):
                         else:
                             logging.warning(f"Unknown command: {json_str['command']}")
             except TimeoutError:
+                # Expected when no command arrives before socket timeout; continue polling.
                 pass
             except socket.timeout:
+                # Expected polling timeout; ignore and keep loop alive.
                 pass
             except Exception as err:
                 logging.error(f"Error in recv thread: {err}")