Implement Uptime Kuma Push Monitor support with separate hook files
following separation of concerns principle.
Changes:
- Add UPTIME_KUMA_PUSH_URL to .env.example
- Create dedicated uptime-kuma-success.sh hook
- Create dedicated uptime-kuma-error.sh hook
- Update config.yaml to call both ntfy and Uptime Kuma hooks
- Each notification service has its own file for modularity
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
