fix: when label-pr job is skipped, enforce workflow doesn't log pr labels

.github/workflows/sdlc-enforce-labels.yml

@@ -7,6 +7,10 @@ on:
         description: "Pull Request Number"
         required: true
         type: number
+      event-labels:
+        description: "PR labels from the triggering event payload (logging only)"
+        required: false
+        type: string
 
 permissions: {}
 

.github/workflows/sdlc-label-pr.yml

@@ -32,7 +32,6 @@ concurrency:
 
 env:
   _PR_NUMBER: ${{ github.event.pull_request.number || inputs.pr-number }}
-  _PR_EVENT_LABELS: ${{ toJSON(github.event.pull_request.labels) }} # for logging purposes
 
 jobs:
   label-pr:
@@ -110,3 +109,4 @@ jobs:
     uses: ./.github/workflows/sdlc-enforce-labels.yml
     with:
       pr-number: ${{ github.event.pull_request.number || inputs.pr-number }}
+      event-labels: ${{ toJSON(github.event.pull_request.labels) }}