[Sentry] Fix app start with cohort migration tag

src/libs/telemetry/middlewares/index.ts

@@ -2,10 +2,11 @@ import type {EventHint, TransactionEvent} from '@sentry/core';
 import emailDomainFilter from './emailDomainFilter';
 import firebasePerformanceFilter from './firebasePerformanceFilter';
 import minDurationFilter from './minDurationFilter';
+import scopeTagsEnricher from './scopeTagsEnricher';
 
 type TelemetryBeforeSend = (event: TransactionEvent, hint: EventHint) => TransactionEvent | null | Promise<TransactionEvent | null>;
 
-const middlewares: TelemetryBeforeSend[] = [emailDomainFilter, firebasePerformanceFilter, minDurationFilter];
+const middlewares: TelemetryBeforeSend[] = [emailDomainFilter, firebasePerformanceFilter, minDurationFilter, scopeTagsEnricher];
 
 function processBeforeSendTransactions(event: TransactionEvent, hint: EventHint): Promise<TransactionEvent | null> {
     return middlewares.reduce(

src/libs/telemetry/middlewares/scopeTagsEnricher.ts

@@ -0,0 +1,38 @@
+import type {TransactionEvent} from '@sentry/core';
+import * as Sentry from '@sentry/react-native';
+import CONST from '@src/CONST';
+import type {TelemetryBeforeSend} from './index';
+
+/**
+ * Enriches transaction with tags and contexts from the current Sentry scope.
+ * This ensures that tags set asynchronously (e.g. nudge_migration_cohort)
+ * are included in transactions that were created before the tags were set.
+ * This middleware applies the tag at send-time, ensuring early spans get the tags.
+ */
+const scopeTagsEnricher: TelemetryBeforeSend = (event: TransactionEvent): TransactionEvent => {
+    const scope = Sentry.getCurrentScope();
+    const scopeData = scope.getScopeData();
+
+    const enrichedEvent = {
+        ...event,
+        tags: {
+            ...event.tags,
+            ...(scopeData.tags?.[CONST.TELEMETRY.TAG_NUDGE_MIGRATION_COHORT] && {
+                [CONST.TELEMETRY.TAG_NUDGE_MIGRATION_COHORT]: scopeData.tags[CONST.TELEMETRY.TAG_NUDGE_MIGRATION_COHORT],
+            }),
+            ...(scopeData.tags?.[CONST.TELEMETRY.TAG_ACTIVE_POLICY] && {
+                [CONST.TELEMETRY.TAG_ACTIVE_POLICY]: scopeData.tags[CONST.TELEMETRY.TAG_ACTIVE_POLICY],
+            }),
+        },
+        contexts: {
+            ...event.contexts,
+            ...(scopeData.contexts?.[CONST.TELEMETRY.CONTEXT_POLICIES] && {
+                [CONST.TELEMETRY.CONTEXT_POLICIES]: scopeData.contexts[CONST.TELEMETRY.CONTEXT_POLICIES],
+            }),
+        },
+    };
+
+    return enrichedEvent;
+};
+
+export default scopeTagsEnricher;