* Introduce "mode" in retry strategy, which indicates WHEN a message…… is dead-lettered: Either IMMEDIATELY after the final exception has been caught, or on NEXT DELIVERY (which is how Rebus worked in versions < 8). Makes it possible for Rebus' retry strategy to work in scenarios where user work and transport operations are enlisted in the same transaction, e.g. like when using the SQL transport in the same transaction as the work being done in a handler.

* Introduce "mode" in retry strategy, which indicates WHEN a message…… is dead-lettered: Either IMMEDIATELY after the final exception has been caught, or on NEXT DELIVERY (which is how Rebus worked in versions < 8). Makes it possible for Rebus' retry strategy to work in scenarios where user work and transport operations are enlisted in the same transaction, e.g. like when using the SQL transport in the same transaction as the work being done in a handler.

* Introduce "mode" in retry strategy, which indicates WHEN a message…… is dead-lettered: Either IMMEDIATELY after the final exception has been caught, or on NEXT DELIVERY (which is how Rebus worked in versions < 8). Makes it possible for Rebus' retry strategy to work in scenarios where user work and transport operations are enlisted in the same transaction, e.g. like when using the SQL transport in the same transaction as the work being done in a handler.

* Add ability to switch back to "legacy retry strategy", where the e……rror tracker is checked BEFORE dispatching the message. This yields slightly slower performance for the sunshine scenario, but it works in scenarios where the transport is actually a database, and all work is enlisted in the same DB transaction.

* Generate saga data IDs in `ISagaDataIdFactory`, which has now beco……me configurable (via `.Sagas(s => s.UseSagaDataIdFactory(customFactory))`). IDs will not by default be sequential (i.e. be based on `Guid.CreateVersion7()` when on .NET 9 and based on `SqlServerSagaIdFactory` on versions before 9)

* Fix error during shutdown when saga locks were obtained - thanks [……xhafan]

* Add additional compile targets and bump System.Text.Json dependenc……y to at least 8.0.5 because almost all the previous versions have weaknesses

* Fix regression that caused encrypted messages to end up unencrypte……d when dead-lettered

* Another bunch of internal tweaks and improvements to improve perfo……rmance across the board - thanks [Henr1k80]

* Make a bunch of internal tweaks and improvements to improve perfor……mance across the board - thanks [Henr1k80]