Refactor message handling and error logging in agent and gateway

- Updated the AIAgent class to extract the first user message for trajectory formatting, improving the accuracy of user queries in the trajectory format.
- Enhanced the GatewayRunner to convert transcript history into the agent format, ensuring proper handling of message roles and content.
- Adjusted the typing indicator refresh rate to every 2 seconds for better responsiveness.
- Improved error handling in the message sending process for the Telegram adapter, implementing a fallback mechanism for Markdown parsing failures, and logging send failures for better debugging.

run_agent.py

@@ -1272,9 +1272,16 @@ class AIAgent:
             return
         
         try:
-            # Convert to trajectory format (reuse existing method)
-            # Use empty string as user_query since it's embedded in messages
-            trajectory = self._convert_to_trajectory_format(messages, "", True)
+            # Extract the first user message for the trajectory format
+            # The first message should be the user's initial query
+            first_user_query = ""
+            for msg in messages:
+                if msg.get("role") == "user":
+                    first_user_query = msg.get("content", "")
+                    break
+            
+            # Convert to trajectory format
+            trajectory = self._convert_to_trajectory_format(messages, first_user_query, True)
             
             # Build the session log entry
             entry = {