examples: update Strands Agents with universal context and add evals

src/pipecat/processors/frameworks/strands_agents.py

@@ -10,12 +10,12 @@ from loguru import logger
 
 from pipecat.frames.frames import (
     Frame,
+    LLMContextFrame,
     LLMFullResponseEndFrame,
     LLMFullResponseStartFrame,
     LLMTextFrame,
 )
 from pipecat.metrics.metrics import LLMTokenUsage
-from pipecat.processors.aggregators.openai_llm_context import OpenAILLMContextFrame
 from pipecat.processors.frame_processor import FrameDirection, FrameProcessor
 
 try:
@@ -71,9 +71,11 @@ class StrandsAgentsProcessor(FrameProcessor):
             direction: The direction of frame flow in the pipeline.
         """
         await super().process_frame(frame, direction)
-        if isinstance(frame, OpenAILLMContextFrame):
-            text = frame.context.messages[-1]["content"]
-            await self._ainvoke(str(text).strip())
+        if isinstance(frame, LLMContextFrame):
+            messages = frame.context.get_messages()
+            if messages:
+                last_message = messages[-1]
+                await self._ainvoke(str(last_message["content"]).strip())
         else:
             await self.push_frame(frame, direction)