add race flag to client tests

using for now a temp fixed for ice

client/firewall/uspfilter/conntrack/udp.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/google/uuid"
+	"golang.org/x/exp/maps"
 
 	nblog "github.com/netbirdio/netbird/client/firewall/uspfilter/log"
 	nftypes "github.com/netbirdio/netbird/client/internal/netflow/types"
@@ -218,3 +219,11 @@ func (t *UDPTracker) sendEvent(typ nftypes.Type, conn *UDPConnTrack, ruleID []by
 		TxBytes:    conn.BytesTx.Load(),
 	})
 }
+
+func (t *UDPTracker) getConnections() map[ConnKey]*UDPConnTrack {
+	t.mutex.RLock()
+	defer t.mutex.RUnlock()
+	copyConn := make(map[ConnKey]*UDPConnTrack, len(t.connections))
+	maps.Copy(copyConn, t.connections)
+	return copyConn
+}

client/firewall/uspfilter/conntrack/udp_test.go

@@ -202,13 +202,13 @@ func TestUDPTracker_Cleanup(t *testing.T) {
 	}
 
 	// Verify initial connections
-	assert.Len(t, tracker.connections, 2)
+	assert.Len(t, tracker.getConnections(), 2)
 
 	// Wait for connection timeout and cleanup interval
 	time.Sleep(timeout + 2*cleanupInterval)
 
 	tracker.mutex.RLock()
-	connCount := len(tracker.connections)
+	connCount := len(tracker.getConnections())
 	tracker.mutex.RUnlock()
 
 	// Verify connections were cleaned up