[UPUP-1006] keyed replica#5

Draft

NatalyaLuzyanina wants to merge 6 commits intotask/UPUP-1003-v2from

task/UPUP-1006-keyed-replica

Commits on Apr 16, 2025

keyed replica added
Natalia Luzyanina
committed

Commits on Apr 17, 2025

some fixes
Natalia Luzyanina
committed
update replica client with creating keyed replica
Natalia Luzyanina
committed

Commits on Apr 18, 2025

added logic to cast keyed replica observer to replica observer
Natalia Luzyanina
committed
fix KeyedReplicaObserversController
Natalia Luzyanina
committed
example for keyed replica added
Natalia Luzyanina
committed