Enable live runs of repo maintenence job via manual trigger (#1300)

* Enable live runs of repo maintenence job via manual trigger

* Allow config options to be set on manual runs of job

.github/workflows/maintenance.yml

@@ -2,8 +2,17 @@ name: Perform automated repository maintenance
 
 on:
   workflow_dispatch:
-  schedule:
-    - cron: "0 */2 * * *"
+    inputs:
+      dry-run:
+        description: "Dry-run"
+        type: boolean
+      operations:
+        description: "Max number of operations per run"
+        type: number
+# Out of an abundance of caution, disabling automatic execution for now
+# TODO: Reschedule job once expected behavior is consistently observed
+#  schedule:
+#    - cron: "0 */2 * * *"
 
 jobs:
   cleanup-inactive:
@@ -17,6 +26,7 @@ jobs:
       total_days: 100
       inactive_label: "no-activity"
       closed_label: "auto-closed"
+      default_operations: ${{ inputs.dry-run && 1000 || 30 }}
     steps:
       - name: Cleanup inactive issues/PRs
         uses: actions/stale@v9
@@ -36,6 +46,6 @@ jobs:
           labels-to-add-when-unstale: "needs-review"
           ascending: true
           enable-statistics: true
-          # DEBUG OPTIONS
-          debug-only: true
-          operations-per-run: 1000
+          # CONFIG OPTIONS
+          debug-only: ${{ inputs.dry-run }}
+          operations-per-run: ${{ inputs.operations || env.default_operations }}