fix: Use flagVersion in analytics events. (#611)

Author: kinyoklion

packages/shared/sdk-client/src/events/EventFactory.ts

@@ -14,7 +14,8 @@ export default class EventFactory extends internal.EventFactoryBase {
     context: Context,
     reason?: LDEvaluationReason,
   ): internal.InputEvalEvent {
-    const { trackEvents, debugEventsUntilDate, trackReason, version, variation } = flag;
+    const { trackEvents, debugEventsUntilDate, trackReason, flagVersion, version, variation } =
+      flag;
 
     return super.evalEvent({
       addExperimentData: trackReason,
@@ -26,7 +27,7 @@ export default class EventFactory extends internal.EventFactoryBase {
       trackEvents: !!trackEvents,
       value,
       variation,
-      version,
+      version: flagVersion ?? version,
     });
   }
 }