- Task model: CustomerNumber field (K-Nummer aus customers.number)
- DB: taskSelectCols joined c.number, scanTask scans CustomerNumber
- Hub: WaitForAgentOnline() polls until agent reconnects or timeout
- Scheduler: executeUpdateWithHealthCheck() waits for agent reconnect after update
- health_check: {agent_online: bool, checked_at: RFC3339} in result
- Status: completed_with_warning wenn Update OK aber Agent offline bleibt
- Frontend: Task-Tabelle zeigt Status-Badge (lauft/fehler/warnung/abgebr.)