Migrate Automation Logic to Core

[baync180705]

Move the detection and backup logic for automation to internal/core/automation.

• Create directory internal/core/automation.
• Move automation/detect.go → internal/core/automation/scanner.go.
  -- Update to use domain.AutomationData.
• Move automation/backup.go → internal/core/automation/backup.go.
  -- Keep the BackupAutomation(data, *tar.Writer) signature for now. It works well as a "Strategy".
• Refactor: Extract GenerateRestorationCommands into internal/core/automation/restore.go.
  --This keeps "Backup logic" separate from "Restore logic".