[No QA] Fix failureNotifier creating issues for non-main branch failures

.github/actions/javascript/failureNotifier/failureNotifier.ts

@@ -17,7 +17,7 @@ type PullRequest = RestEndpointMethodTypes['repos']['listPullRequestsAssociatedW
  * targeting the correct base branch to avoid blaming the wrong PR.
  */
 function getMergedPR(associatedPRs: PullRequest[], targetBranch = 'main'): PullRequest | undefined {
-    return associatedPRs.find((pr) => pr.merged_at !== null && pr.base.ref === targetBranch) ?? associatedPRs.at(0);
+    return associatedPRs.find((pr) => pr.merged_at !== null && pr.base.ref === targetBranch);
 }
 
 async function run() {

.github/actions/javascript/failureNotifier/index.js

@@ -9559,7 +9559,7 @@ const github = __importStar(__nccwpck_require__(5438));
  * targeting the correct base branch to avoid blaming the wrong PR.
  */
 function getMergedPR(associatedPRs, targetBranch = 'main') {
-    return associatedPRs.find((pr) => pr.merged_at !== null && pr.base.ref === targetBranch) ?? associatedPRs.at(0);
+    return associatedPRs.find((pr) => pr.merged_at !== null && pr.base.ref === targetBranch);
 }
 async function run() {
     const token = core.getInput('GITHUB_TOKEN', { required: true });

.github/workflows/failureNotifier.yml

@@ -3,6 +3,7 @@ name: Notify on Workflow Failure
 on:
   workflow_run:
     workflows: ["Process new code merged to main", "Remote Build iOS", "Remote Build Android"]
+    branches: [main]
     types:
       - completed
 

tests/unit/FailureNotifierTest.ts

@@ -65,13 +65,12 @@ describe('getMergedPR', () => {
         expect(result?.number).toBe(82016);
     });
 
-    it('should fall back to first PR if no merged PR is found', () => {
+    it('should return undefined when no merged PR is found instead of blaming an unmerged PR', () => {
         const associatedPRs = [openPRWithMainMerged, openPRDifferentBase];
 
         const result = getMergedPR(associatedPRs);
 
-        // Falls back to first element when no merged PR matches
-        expect(result?.number).toBe(80254);
+        expect(result).toBeUndefined();
     });
 
     it('should return undefined for empty array', () => {