Function dispatch 

async fn dispatch(
    cmd: &Command,
    db: &DB,
    server_start: Instant,
    session: &Arc<Mutex<AdminSession>>,
    shutdown_tx: &Sender<bool>,
)

Dispatches the parsed command to the appropriate handler function.

Arguments

• cmd - A reference to the parsed Command struct.
• db - A reference to the database connection.
• server_start - The instant when the server started, used for uptime calculations.
• session - A reference to the admin session, wrapped in Arc<Mutex<>> for thread-safe access.
• shutdown_tx - A watch channel sender to signal server shutdown.