fix: langfuse upgrade and crew result usage (#4342)

* lanfuse upgrade and crew result usage

* ✅ (Dynamic Agent.spec.ts): Enable tests for checking the presence of required environment variables before running the test suite.

✨ (Hierarchical Agent.spec.ts): Add integration test for Hierarchical Tasks Agent to ensure proper functionality and behavior
✨ (Sequential Task Agent.spec.ts): Add integration test for Sequential Tasks Agent to ensure proper functionality and behavior

---------

Co-authored-by: cristhianzl <cristhian.lousa@gmail.com>

src/backend/base/langflow/base/agents/crewai/crew.py

@@ -78,6 +78,6 @@ class BaseCrewComponent(Component):
     async def build_output(self) -> Message:
         crew = self.build_crew()
         result = await crew.kickoff_async()
-        message = Message(text=result, sender=MESSAGE_SENDER_AI)
+        message = Message(text=result.raw, sender=MESSAGE_SENDER_AI)
         self.status = message
         return message