Fix CodeRabbit findings: hasIPv6Changed restart loop, empty peerIPs panic, v6 validation

client/iface/wgaddr/address.go

@@ -1,10 +1,7 @@
 package wgaddr
 
 import (
-	"fmt"
 	"net/netip"
-
-	"github.com/netbirdio/netbird/shared/netiputil"
 )
 
 // Address WireGuard parsed address
@@ -59,23 +56,6 @@ func (addr Address) IPv6Prefix() netip.Prefix {
 	return netip.PrefixFrom(addr.IPv6, addr.IPv6Net.Bits())
 }
 
-// SetIPv6FromCompact decodes a compact prefix (5 or 17 bytes) and sets the IPv6 fields.
-// Returns an error if the bytes are invalid. A nil or empty input is a no-op.
-//
-//nolint:recvcheck
-func (addr *Address) SetIPv6FromCompact(raw []byte) error {
-	if len(raw) == 0 {
-		return nil
-	}
-	prefix, err := netiputil.DecodePrefix(raw)
-	if err != nil {
-		return fmt.Errorf("decode v6 overlay address: %w", err)
-	}
-	addr.IPv6 = prefix.Addr()
-	addr.IPv6Net = prefix.Masked()
-	return nil
-}
-
 // ClearIPv6 removes the IPv6 overlay address, leaving only v4.
 //
 //nolint:recvcheck // ClearIPv6 is the only mutating method on this otherwise value-type struct.