ready label check (#1832)

SUMMARY:
To prevent merges into main where the `ready` label has not been
applied, add a quick github actions check that errors out if it has not
been applied to an open PR. This will prevent maintainers from merging
into main without ready label


TEST PLAN:
- [x] Confirmed error appears when ready label is not added. Repo owner
can add this to the list of checks to prevent it from being mergeable
<img width="927" height="657" alt="Screenshot 2025-09-17 at 9 50 10 AM"
src="https://github.com/user-attachments/assets/12bc6a72-c41d-45be-9e75-ae1fbcef00e4"
/>

---------

Signed-off-by: Brian Dellabetta <[email protected]>

Author: brian-dellabetta

.github/workflows/ready-label-check.yaml

@@ -0,0 +1,26 @@
+name: Check Ready Label
+
+on:
+  pull_request:
+    branches: [ main , 'release/*' ]
+    types:
+      - labeled
+      - unlabeled
+      - opened
+      - reopened
+
+jobs:
+  ready-label-check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Fail if ready label has not been applied to PR
+        if: "!contains(github.event.pull_request.labels.*.name, 'ready')"
+        run: |
+          echo "::error::The PR is not labeled as 'ready'"
+          exit 1
+
+      - name: Succeed if ready label has been applied to PR
+        if: contains(github.event.pull_request.labels.*.name, 'ready')
+        run: |
+          echo "::info::The PR is labeled as 'ready'"
+          exit 0