Implement scheduled automatic syncs

[eric-downes]

Enhancement Description

Add ability to schedule automatic sync operations at regular intervals.

Proposed Features

• Cron-like scheduling syntax
• Background daemon mode
• Configurable sync intervals
• Email/notification on sync completion or errors
• Sync status dashboard

Implementation Options

1. Built-in scheduler

   • Python scheduling library (e.g., schedule, APScheduler)
   • Background process management

2. System integration

   • Cron job templates
   • systemd service files
   • Windows Task Scheduler support

Configuration Example

sync:
  schedule: "0 2 * * *"  # Daily at 2 AM
  projects: "all"  # or specific project list
  notify_email: user@example.com
  headless: true

Benefits

• Automated backups
• No manual intervention needed
• Regular knowledge base updates