fix(app): Normalize provisioning templates and Clerk props

Use autoescape for Jinja rendering to satisfy bandit checks and\nremove deprecated Clerk SignInButton props to restore type checks.\nAlso ignore tsbuildinfo artifacts and tidy boot instructions.\n\nCo-Authored-By: Claude <noreply@anthropic.com>

templates/HEARTBEAT.md

@@ -7,6 +7,10 @@ If this file is empty, skip heartbeat work.
 - AUTH_TOKEN (agent token)
 - AGENT_NAME
 
+## Schedule
+- Run this heartbeat every 10 minutes.
+- On first boot, send one immediate check-in before the schedule starts.
+
 ## On every heartbeat
 1) Check in:
 ```bash