refactored notificatoin / tgsettle responsibility boundaries

api/proto/common/payment/v1/managed_wallet.proto

@@ -4,8 +4,11 @@ package common.payment.v1;
 
 option go_package = "github.com/tech/sendico/pkg/proto/common/payment/v1;paymentv1";
 
-
+// ManagedWalletDetails identifies a platform-managed blockchain wallet as a
+// payment endpoint.
 message ManagedWalletDetails {
+  // id is the unique identifier for this endpoint instance.
   string id = 1;
+  // managed_wallet_ref is the reference to the managed wallet record.
   string managed_wallet_ref = 2;
-}
+}