Add attachments-only filter to uploads

When uploading a file which is an e-mail, this option allows to skip
the mail body when the file is being processed.

modules/restserver/src/main/scala/docspell/restserver/conv/Conversions.scala

@@ -337,7 +337,8 @@ trait Conversions {
               m.skipDuplicates.getOrElse(false),
               m.fileFilter.getOrElse(Glob.all),
               m.tags.map(_.items).getOrElse(Nil),
-              m.language
+              m.language,
+              m.attachmentsOnly
             )
           )
         )
@@ -345,7 +346,17 @@ trait Conversions {
       .getOrElse(
         (
           true,
-          UploadMeta(None, sourceName, None, validFileTypes, false, Glob.all, Nil, None)
+          UploadMeta(
+            None,
+            sourceName,
+            None,
+            validFileTypes,
+            false,
+            Glob.all,
+            Nil,
+            None,
+            None
+          )
         )
           .pure[F]
       )

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

@@ -125,7 +125,8 @@ object ScanMailboxRoutes {
           settings.tags.map(_.items),
           settings.subjectFilter,
           settings.language,
-          settings.postHandleAll
+          settings.postHandleAll,
+          settings.attachmentsOnly
         )
       )
     )
@@ -159,6 +160,7 @@ object ScanMailboxRoutes {
       task.args.fileFilter,
       task.args.subjectFilter,
       task.args.language,
-      task.args.postHandleAll
+      task.args.postHandleAll,
+      task.args.attachmentsOnly
     )
 }