fix ownership

pkg/actor/grain_pool.go

@@ -37,5 +37,5 @@ type Host interface {
 	Close() error
 	Ping() bool
 	IsHealthy() bool
-	AnnounceOwnership(ids []uint64)
+	AnnounceOwnership(ownerHost string, ids []uint64)
 }

pkg/actor/simple_grain_pool.go

@@ -342,7 +342,7 @@ func (p *SimpleGrainPool[V]) broadcastOwnership(ids []uint64) {
 	}
 
 	p.forAllHosts(func(rh Host) {
-		rh.AnnounceOwnership(ids)
+		rh.AnnounceOwnership(p.hostname, ids)
 	})
 	log.Printf("taking ownership of %d ids", len(ids))
 	// go p.statsUpdate()