feat: add previously interrupted message to current

ref: N25B-452

src/control_backend/agents/llm/llm_agent.py

@@ -35,6 +35,7 @@ class LLMAgent(BaseAgent):
         self.history = []
         self._querying = False
         self._interrupted = False
+        self._interrupted_message = ""
         self._go_ahead = asyncio.Event()
 
     async def setup(self):
@@ -82,11 +83,14 @@ class LLMAgent(BaseAgent):
             self._interrupted = True  # interrupt the previous processing
             await self._go_ahead.wait()  # wait until we get the go-ahead
 
+        message.text = f"{self._interrupted_message} {message.text}"
+
         self._go_ahead.clear()
         self._querying = True
         full_message = ""
         async for chunk in self._query_llm(message.text, message.norms, message.goals):
             if self._interrupted:
+                self._interrupted_message = message
                 self.logger.debug("Interrupted processing of previous message.")
                 break
             await self._send_reply(chunk)
@@ -105,6 +109,7 @@ class LLMAgent(BaseAgent):
             )
             await self._send_full_reply(full_message)
 
+        self._go_ahead.set()
         self._interrupted = False
 
     async def _send_reply(self, msg: str):