Wash Sale Rule --> disallowed loss carry forward in this particular scenario where I buy replacement shares just *before* selling the entire position?

The only time that a loss is lost forever is when the realized loss occurs in a non-retirement account and the replacement shares are purchased in an IRA account. That's because the cost basis of the IRA shares cannot be increased. Since you made no mention of a using two account types, this isn't applicable.

In your example, trade (3) liquidates all shares purchased on 7/01/19 and 4/5/20 so there is no wash sale. Some will argue that trade (2) creates a wash sale because the shares were purchased within 30 days of the loss realized on 4/25/20 but that's not the case because they weren't replacement shares (there's no ongoing open position).

Trade (4) creates the wash sale violation because replacement shares were bought within 30 days of the realized loss and the cost basis must be adjusted. Once sold on 5/08/20, there's no more issue since there are no open positions.

Regardless of what the prices were in any of these trades, anything bought 31 days after trade (5) would have no wash sale possibility since the purchase date was outside of the wash sale violation window.

Note that wash sale violations are not an issue if all involved positions are closed in the current calendar year. If replacement shares have an adjusted cost basis due to a wash sale violation and these replacement shares are not sold in the current year then the loss is deferred to at least the next calendar year.