Function create_code_session 

pub async fn create_code_session(
    base_url: &str,
    access_token: &str,
    title: &str,
    timeout_ms: u64,
    tags: Option<Vec<String>>,
) -> Option<String>

Create a new code session via POST /v1/code/sessions

Arguments

• base_url - The API base URL
• access_token - OAuth access token
• title - Session title
• timeout_ms - Request timeout in milliseconds
• tags - Optional tags for the session

Returns the session ID on success, or None if creation fails.