Change autoloop schedule to every 15 minutes

Agent-Logs-Url: https://github.com/githubnext/tsessebe/sessions/019ae638-e586-4a17-8c0a-e3e565286d1a

Co-authored-by: mrjf <180956+mrjf@users.noreply.github.com>

Author: Copilot

.github/workflows/autoloop.lock.yml

@@ -12,7 +12,7 @@ description: |
   - Maintains a single GitHub issue per program where all status, iteration logs, and human steering live
 
 on:
-  schedule: every 30m
+  schedule: every 15m
   workflow_dispatch:
     inputs:
       program: