regenerate messages.proto

[JssDWt]

There was a recurring error in logs when invoking lspActivity:
Regenerate the grpc code to resync with breez library.

2024-05-30 12:44:51.549 [INF] BIND: rpc error: code = Internal desc = grpc: error while marshaling: string field contains invalid UTF-8
#0      BreezBridge._invokeMethodWhenReady.<anonymous closure>.<anonymous closure> (package:breez/services/breezlib/breez_bridge.dart:924)
#1      _rootRunUnary (dart:async/zone.dart:1406)
#2      _CustomZone.runUnary (dart:async/zone.dart:1307)
#3      _FutureListener.handleError (dart:async/future_impl.dart:165)
#4      Future._propagateToListeners.handleError (dart:async/future_impl.dart:779)
#5      Future._propagateToListeners (dart:async/future_impl.dart:800)
#6      Future._completeError (dart:async/future_impl.dart:575)
#7      _SuspendState._createAsyncStarCallback.<anonymous closure> (dart:async-patch/async_patch.dart:353)
#8      _rootRunUnary (dart:async/zone.dart:1406)
#9      _CustomZone.runUnary (dart:async/zone.dart:1307)
<asynchronous suspension>

[JssDWt]

Regenerating the proto again with proper settings actually had no changes.