"Allow dividends to route to correct broker cash accounts when stocks are owned under multiply brokers "

Description: When I hold the same stock (like CBA) across multiple brokers, dividends should automatically go to the correct broker's cash account based on where each dividend was actually paid, not just the holding's overall broker source setting. Currently, all dividends from a single holding go to one cash account, which means Superhero dividends might incorrectly appear in my CommSec cash account. This would make dividend tracking much more accurate for users with diversified broker portfolios.