feat: audit api, sdwan persist, relay fallback updates

internal/server/coordinator.go

@@ -3,6 +3,7 @@ package server
 import (
 	"fmt"
 	"log"
+	"os"
 	"time"
 
 	"github.com/openp2p-cn/inp2p/pkg/auth"
@@ -68,6 +69,19 @@ func (s *Server) HandleConnectReq(from *NodeInfo, req protocol.ConnectReq) error
 		return nil
 	}
 
+	// Debug: force relay path if explicit env set
+	if os.Getenv("INP2P_FORCE_RELAY") == "1" {
+		log.Printf("[coord] %s → %s: force relay requested", from.Name, to.Name)
+		from.Conn.Write(protocol.MsgPush, protocol.SubPushConnectRsp, protocol.ConnectRsp{
+			Error:  0,
+			From:   to.Name,
+			To:     from.Name,
+			Peer:   toParams,
+			Detail: "punch-failed",
+		})
+		return nil
+	}
+
 	// Push PunchStart to BOTH sides simultaneously
 	punchID := fmt.Sprintf("%s-%s-%d", from.Name, to.Name, time.Now().UnixMilli())