extend expire timer update message TTL to be default 14 days

SessionMessagingKit/Messages/Message.swift

@@ -658,6 +658,7 @@ public extension Message {
     
     internal static func getSpecifiedTTL(
         message: Message,
+        isGroupMessage: Bool,
         isSyncMessage: Bool
     ) -> UInt64 {
         guard Features.useNewDisappearingMessagesConfig else { return message.ttl }
@@ -677,6 +678,8 @@ public extension Message {
         switch message {
             case is ClosedGroupControlMessage, is UnsendRequest:
                 return message.ttl
+            case is ExpirationTimerUpdate:
+                return isGroupMessage ? message.ttl : UInt64(expiresInSeconds * 1000)
             default:
                 return UInt64(expiresInSeconds * 1000)
         }

SessionMessagingKit/Sending & Receiving/MessageSender.swift

@@ -348,7 +348,16 @@ public final class MessageSender {
         let snodeMessage = SnodeMessage(
             recipient: message.recipient!,
             data: base64EncodedData,
-            ttl: Message.getSpecifiedTTL(message: message, isSyncMessage: isSyncMessage),
+            ttl: Message.getSpecifiedTTL(
+                message: message,
+                isGroupMessage: {
+                    switch destination {
+                        case .closedGroup: return true
+                        default: return false
+                    }
+                }(),
+                isSyncMessage: isSyncMessage
+            ),
             timestampMs: UInt64(messageSendTimestamp)
         )