Enable cloud_llm brick (#26)

Author: stefanotorneo

src/arduino/app_bricks/cloud_llm/brick_config.yaml

@@ -1,7 +1,6 @@
 id: arduino:cloud_llm
 name: Cloud LLM
 description: "Cloud LLM Brick enables seamless integration with cloud-based Large Language Models (LLMs) for advanced AI capabilities in your Arduino projects."
-disabled: true
-
 variables:
-  - API_KEY
+  - name: API_KEY
+    description: API Key for the cloud-based LLM service

src/arduino/app_bricks/cloud_llm/cloud_llm.py

@@ -12,6 +12,7 @@
 from langchain_core.messages import SystemMessage
 from langchain_core.output_parsers import StrOutputParser
 from langchain_core.chat_history import InMemoryChatMessageHistory
+from langsmith import uuid7
 
 from arduino.app_utils import Logger, brick
 
@@ -79,7 +80,7 @@ def __init__(
             timeout=self._timeout,
         )
         self._parser = StrOutputParser()
-        self._history_cfg = {"configurable": {"session_id": "default_session"}}
+        self._history_cfg = {"configurable": {"session_id": uuid7()}}
 
         core_chain = self._prompt | self._model | self._parser
         self._chain = RunnableWithMessageHistory(