get_teams_conversation_history3.py

def get_teams_conversation_history(user_graph_auth_token, event_body):
    #...
    if conversation_type == "channel":
        #...
        # Fetch all responses in the Post/thread
        url = f"https://graph.microsoft.com/v1.0/teams/{team_id}/channels/{channel_id}/messages/{parent_message_id}/replies"

        # Get previous messages
        response = requests.get(url, headers=headers)
        if response.status_code != 200:
            raise Exception(f"Graph API error {response.status_code}: {response.text}")
        data = response.json()
        messages = data.get("value", [])
        
        # Sort so we get the oldest first
        messages = list(reversed(messages))