[client] Enable network map persistence by default (#3152)

client/internal/connect.go

@@ -382,8 +382,7 @@ func (c *ConnectClient) isContextCancelled() bool {
 // SetNetworkMapPersistence enables or disables network map persistence.
 // When enabled, the last received network map will be stored and can be retrieved
 // through the Engine's getLatestNetworkMap method. When disabled, any stored
-// network map will be cleared. This functionality is primarily used for debugging
-// and should not be enabled during normal operation.
+// network map will be cleared.
 func (c *ConnectClient) SetNetworkMapPersistence(enabled bool) {
 	c.engineMutex.Lock()
 	c.persistNetworkMap = enabled

client/internal/engine.go

@@ -1597,7 +1597,7 @@ func (e *Engine) GetLatestNetworkMap() (*mgmProto.NetworkMap, error) {
 		return nil, nil
 	}
 
-	// Create a deep copy to avoid external modifications
+	log.Debugf("Retrieving latest network map with size %d bytes", proto.Size(e.latestNetworkMap))
 	nm, ok := proto.Clone(e.latestNetworkMap).(*mgmProto.NetworkMap)
 	if !ok {
 

client/server/server.go

@@ -91,6 +91,8 @@ func New(ctx context.Context, configPath, logFile string) *Server {
 		signalProbe: internal.NewProbe(),
 		relayProbe:  internal.NewProbe(),
 		wgProbe:     internal.NewProbe(),
+
+		persistNetworkMap: true,
 	}
 }