filter out lemmas with saveVocab set to false

lib/pangea/controllers/my_analytics_controller.dart

@@ -190,6 +190,7 @@ class MyAnalyticsController extends BaseController {
     );
 
     final uses = tokens
+        .where((token) => token.lemma.saveVocab)
         .map(
           (token) => OneConstructUse(
             useType: useType,

lib/pangea/models/representation_content_model.dart

@@ -163,12 +163,15 @@ class PangeaRepresentation {
           ),
         );
       }
+
+      if (lemma.saveVocab) {
         uses.add(
           lemma.toVocabUse(
             inUserL2 ? ConstructUseTypeEnum.wa : ConstructUseTypeEnum.unk,
             metadata,
           ),
         );
+      }
       return uses;
     }
 
@@ -216,12 +219,14 @@ class PangeaRepresentation {
         ),
       );
     }
+    if (lemma.saveVocab) {
       uses.add(
         lemma.toVocabUse(
           ConstructUseTypeEnum.wa,
           metadata,
         ),
       );
+    }
     return uses;
   }
 }