fix(client.py): add concurrency flag to SIGINT handler to prevent bei…

…ng handled multiple times

Fixes AgentOps-AI#477

agentops/client.py

@@ -318,6 +318,8 @@ def cleanup(end_state: str = "Fail", end_state_reason: Optional[str] = None):
                         end_state_reason=end_state_reason,
                     )
 
+        __handled = False
+
         def signal_handler(signum, frame):
             """
             Signal handler for SIGINT (Ctrl+C) and SIGTERM. Ends the session and exits the program.
@@ -326,6 +328,10 @@ def signal_handler(signum, frame):
                 signum (int): The signal number.
                 frame: The current stack frame.
             """
+            nonlocal __handled
+            if __handled:
+                return
+            __handled = True
             signal_name = "SIGINT" if signum == signal.SIGINT else "SIGTERM"
             logger.info("%s detected. Ending session...", signal_name)
             self.end_session(