Moving unit testing to a merge queue. (#1069)

## Summary
<!--- This is a required section; please describe the main purpose of
this proposed code change. --->

<!---
## Details
This is an optional section; is there anything specific that reviewers
should be aware of?
--->
Moving unit testing to a merge queue.

## Testing Done
<!--- This is a required section; please describe how this change was
tested. --->

<!-- 
Replace BLANK with your device type. For example, A100-80G-PCIe

Complete the following tasks before sending your PR, and replace `[ ]`
with
`[x]` to indicate you have done them. 
-->
Not applicable, workflow change.

- Hardware Type: <BLANK>
- [x] run `make test` to ensure correctness
- [x] run `make checkstyle` to ensure code style
- [x] run `make test-convergence` to ensure convergence

.github/workflows/amd-ci.yml

@@ -13,11 +13,14 @@ on:
     paths:
       - "src/**"
       - "test/**"
+  merge_group:
+    branches:
+      - main
   workflow_dispatch:  # Enables manual trigger
 
 concurrency:
   # This causes it to cancel previous in-progress actions on the same PR / branch,
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.event.merge_group.head_ref || github.ref }}
   cancel-in-progress: true
 
 jobs:

.github/workflows/intel-ci.yml

@@ -13,11 +13,14 @@ on:
     paths:
       - "src/**"
       - "test/**"
+  merge_group:
+    branches:
+      - main
   workflow_dispatch:  # Enables manual trigger
 
 concurrency:
   # This causes it to cancel previous in-progress actions on the same PR / branch,
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.event.merge_group.head_ref || github.ref }}
   cancel-in-progress: true
 
 jobs:

.github/workflows/merge-queue-failure.yml

@@ -0,0 +1,78 @@
+name: Merge Queue Failure Handler
+
+on:
+  workflow_run:
+    workflows: ["NVIDIA GPU"]
+    types: [completed]
+    branches: [main]
+
+permissions:
+  pull-requests: write
+  issues: write
+
+jobs:
+  handle-failure:
+    runs-on: ubuntu-latest
+    if: >
+      github.event.workflow_run.conclusion == 'failure' &&
+      github.event.workflow_run.event == 'merge_group'
+
+    steps:
+    - name: Extract PR number from merge group
+      id: extract-pr
+      uses: actions/github-script@v7
+      with:
+        script: |
+          const headRef = '${{ github.event.workflow_run.head_branch }}';
+          // Merge group branch format: gh-readonly-queue/main/pr-{number}-{sha}
+          const match = headRef.match(/pr-(\d+)-/);
+          if (match) {
+            return match[1];
+          }
+          return null;
+        result-encoding: string
+
+    - name: Comment on PR
+      if: steps.extract-pr.outputs.result != 'null'
+      uses: actions/github-script@v7
+      with:
+        script: |
+          const prNumber = parseInt('${{ steps.extract-pr.outputs.result }}');
+          const workflowName = '${{ github.event.workflow_run.name }}';
+          const runUrl = '${{ github.event.workflow_run.html_url }}';
+
+          // Check if PR exists and is open
+          try {
+            const { data: pr } = await github.rest.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: prNumber
+            });
+
+            // Add comment about merge queue failure
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: prNumber,
+              body: `## ⚠️ Merge Queue Failed\n\nThe merge queue validation failed for this PR.\n\n**Failed Workflow:** ${workflowName}\n**Run Details:** ${runUrl}\n\nThe PR has been automatically removed from the merge queue. Please review the test failures and push fixes to re-attempt merging.`
+            });
+
+            // If PR was somehow closed, reopen it
+            if (pr.state === 'closed') {
+              await github.rest.pulls.update({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                pull_number: prNumber,
+                state: 'open'
+              });
+
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: prNumber,
+                body: '🔄 This PR has been automatically reopened after merge queue failure.'
+              });
+            }
+          } catch (error) {
+            console.log(`Could not process PR #${prNumber}: ${error.message}`);
+          }

.github/workflows/nvi-ci.yml

@@ -13,10 +13,13 @@ on:
     paths:
       - "src/**"
       - "test/**"
+  merge_group:
+    branches:
+      - main
   workflow_dispatch:  # Enables manual trigger
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.event.merge_group.head_ref || github.ref }}
   cancel-in-progress: true
 
 jobs: