feat: custom IP selection and forward list enhancements (#247)

* feat: add comprehensive migration test for legacy columns

- Add ExtraIPs, TCPListenAddr, UDPListenAddr to Node migration
- Add ip_preference to Tunnel migration
- Add test for very legacy database migration (1.x schema)
- Include issue #211 tracking document

Entire-Checkpoint: 0d086883c34a

* fix: apply custom IP binding to forward and tunnel chain services

Entire-Checkpoint: ceff329d4cf4

go-backend/internal/http/handler/mutations.go

@@ -2643,7 +2643,7 @@ func buildTunnelChainServiceConfig(tunnelID int64, chainNode tunnelRuntimeNode,
 	}
 	service := map[string]interface{}{
 		"name":    fmt.Sprintf("%d_tls", tunnelID),
-		"addr":    fmt.Sprintf("%s:%d", node.TCPListenAddr, chainNode.Port),
+		"addr":    processServerAddress(fmt.Sprintf("%s:%d", defaultString(strings.TrimSpace(chainNode.ConnectIP), node.TCPListenAddr), chainNode.Port)),
 		"handler": handlerCfg,
 		"listener": map[string]interface{}{
 			"type": protocol,