Perform a soft restart of the router.
This method gracefully restarts all major router components in sequence:
- Stops the client manager
- Reinitializes the bandwidth limiter
- Restarts the message registry and communication system
- Restarts the tunnel manager
- Waits for components to stabilize
- Restarts the client manager and message pool
- Rebuilds router info and marks router as alive
The restart process is designed to minimize downtime and maintain
network connectivity where possible.