feat(agent): include system prompt in agent status output

Added the system prompt to the AIAgent class's status output, ensuring that the current system prompt is included in the agent's status information. This enhancement improves visibility into the agent's configuration during runtime.

run_agent.py

@@ -1152,6 +1152,7 @@ class AIAgent:
                 "platform": self.platform,
                 "session_start": self.session_start.isoformat(),
                 "last_updated": datetime.now().isoformat(),
+                "system_prompt": self._cached_system_prompt or "",
                 "message_count": len(cleaned),
                 "messages": cleaned,
             }