Change scanRecursively to an Option field

modules/common/src/main/scala/docspell/common/ScanMailboxArgs.scala

@@ -24,7 +24,7 @@ case class ScanMailboxArgs(
     // the configured imap connection
     imapConnection: Ident,
     // scan folders recursively
-    scanRecursively: Boolean,
+    scanRecursively: Option[Boolean],
     // what folders to search
     folders: List[String],
     // only select mails received since then

modules/joex/src/main/scala/docspell/joex/scanmailbox/ScanMailboxTask.scala

@@ -98,7 +98,7 @@ object ScanMailboxTask {
       if (acc.noneLeft(name)) acc.pure[F]
       else
         mailer
-          .run(impl.handleFolder(theEmil.access, upload)(name, ctx.args.scanRecursively))
+          .run(impl.handleFolder(theEmil.access, upload)(name, ctx.args.scanRecursively.getOrElse(false)))
           .map(_ ++ acc)
 
     Stream

modules/restserver/src/main/scala/docspell/restserver/routes/ScanMailboxRoutes.scala

@@ -115,7 +115,7 @@ object ScanMailboxRoutes {
         ScanMailboxArgs(
           user,
           settings.imapConnection,
-          settings.scanRecursively,
+          Option(settings.scanRecursively),
           settings.folders,
           settings.receivedSinceHours.map(_.toLong).map(Duration.hours),
           settings.targetFolder,
@@ -151,7 +151,7 @@ object ScanMailboxRoutes {
       task.summary,
       conn.getOrElse(Ident.unsafe("")),
       task.args.folders,
-      task.args.scanRecursively,
+      task.args.scanRecursively.getOrElse(false),
       task.timer,
       task.args.receivedSince.map(_.hours.toInt),
       task.args.targetFolder,