Add on.cooldown workflow gating (#56998)

Author: Copilot

.github/workflows/aw-failure-investigator.lock.yml

@@ -3,7 +3,8 @@ emoji: "🔍"
 description: Investigates [aw] failures from the last 6 hours, correlates with open agentic-workflows issues, closes fixed issues, and opens focused fix sub-issues when needed
 on:
   schedule:
-    - cron: "every 6h"
+    - cron: "every 30m"
+  cooldown: 6h
   workflow_dispatch:
 max-daily-ai-credits: 10000
 permissions:

.github/workflows/aw-failure-investigator.md

@@ -6,6 +6,7 @@ on:
     name: ci-doctor
     events: [pull_request]
     strategy: decentralized
+  cooldown: 1h
 
 max-daily-ai-credits: 10000
 permissions: