fix(cron): use wakeMode 'now' for immediate execution

'next-heartbeat' only queues for next natural heartbeat.
'now' executes immediately when cron fires.

clawdinator/cron-jobs.json

@@ -10,7 +10,7 @@
         "expr": "0 * * * *"
       },
       "sessionTarget": "main",
-      "wakeMode": "next-heartbeat",
+      "wakeMode": "now",
       "payload": {
         "kind": "systemEvent",
         "text": "Read HEARTBEAT.md if exists. Consider outstanding tasks. Checkup sometimes on your human during (user local) day time."