openapi improvements

common/data/src/main/java/org/thingsboard/server/common/data/mobile/layout/MobilePage.java

@@ -48,6 +48,7 @@ import java.io.Serializable;
 })
 public interface MobilePage extends Serializable {
 
+    @Schema(requiredMode = Schema.RequiredMode.REQUIRED)
     @JsonView(Views.Private.class)
     MobilePageType getType();
 

common/data/src/main/java/org/thingsboard/server/common/data/notification/rule/trigger/config/NotificationRuleTriggerConfig.java

@@ -66,6 +66,7 @@ import java.io.Serializable;
 })
 public interface NotificationRuleTriggerConfig extends Serializable {
 
+    @Schema(requiredMode = Schema.RequiredMode.REQUIRED)
     NotificationRuleTriggerType getTriggerType();
 
     @JsonIgnore

common/data/src/main/java/org/thingsboard/server/common/data/sync/ie/EntityExportData.java

@@ -78,7 +78,7 @@ public class EntityExportData<E extends ExportableEntity<? extends EntityId>> {
     @Schema(implementation = ExportableEntity.class)
     private E entity;
     @JsonProperty(index = 1)
-    @Schema
+    @Schema(requiredMode = Schema.RequiredMode.REQUIRED)
     private EntityType entityType;
 
     @JsonProperty(index = 100)