Collect parameter values as workflow_dispatch inputs

And apply an additional cron schedule for testing

.github/workflows/locker.yml

@@ -1,10 +1,18 @@
 name: Locker - Lock stale issues and PRs
 on:
   schedule:
-    - cron: '0 9 * * *'
+    - cron: '0 9 * * *' # Once per day, early morning PT
+    - cron: '0/5 * * * *' # Every 5 minutes (for testing)
 
   workflow_dispatch:
     # Manual triggering through the GitHub UI, API, or CLI
+    inputs:
+      daysSinceClose:
+        required: true
+        default: "30"
+      daysSinceUpdate:
+        required: true
+        default: "30"
 
 permissions:
   issues: write
@@ -25,5 +33,5 @@ jobs:
       - name: Run Locker
         uses: ./actions/locker
         with:
-          daysSinceClose: 14
-          daysSinceUpdate: 14
+          daysSinceClose:  ${{ fromJson(inputs.daysSinceClose  || 30) }}
+          daysSinceUpdate: ${{ fromJson(inputs.daysSinceUpdate || 30) }}