Add printed out responses for easier debugging from tests

letta/schemas/letta_response.py

@@ -1,3 +1,4 @@
+import json
 from typing import List, Union
 
 from pydantic import BaseModel, Field
@@ -23,6 +24,16 @@ class LettaResponse(BaseModel):
     messages: Union[List[Message], List[LettaMessage]] = Field(..., description="The messages returned by the agent.")
     usage: LettaUsageStatistics = Field(..., description="The usage statistics of the agent.")
 
+    def __str__(self):
+        return json.dumps(
+            {
+                "messages": [message.model_dump() for message in self.messages],
+                # Assume `Message` and `LettaMessage` have a `dict()` method
+                "usage": self.usage.model_dump(),  # Assume `LettaUsageStatistics` has a `dict()` method
+            },
+            indent=4,
+        )
+
 
 # The streaming response is either [DONE], [DONE_STEP], [DONE], an error, or a LettaMessage
 LettaStreamingResponse = Union[LettaMessage, MessageStreamStatus]