When domain, SSL certificate, or proxy provider changes in settings:
- Delete old proxy routes from the previous provider
- Switch to None: clear all route IDs on instances
- Switch to NPM/Traefik: re-create routes with new settings
- Domain change: re-configure all routes with new FQDN
- SSL cert change: re-apply to all existing routes
- Provider created dynamically at runtime via createProxyProvider()
- Deployer and API server updated via SetProxyProvider callback
alexei.dolgolyov
61febefca9