fix: (p2p.go) initialize activeSubnets for the case of SubscribeRandoms that updates activeSubnets.

Author: y0sher

network/p2p/p2p.go

@@ -136,6 +136,7 @@ func New(
 		msgValidator:            cfg.MessageValidator,
 		state:                   stateClosed,
 		activeCommittees:        hashmap.New[string, validatorStatus](),
+		activeSubnets:           make([]byte, commons.SubnetsCount),
 		nodeStorage:             cfg.NodeStorage,
 		operatorPKHashToPKCache: hashmap.New[string, []byte](),
 		operatorSigner:          cfg.OperatorSigner,