feat: add Go backend

server/utility/encrypt/field_test.go

@@ -0,0 +1,15 @@
+package encrypt
+
+import "testing"
+
+func TestMasking(t *testing.T) {
+	if got := MaskMobile("13800000001"); got != "138****0001" {
+		t.Fatalf("mobile mask: %s", got)
+	}
+	if got := MaskName("测试会员"); got != "测***" {
+		t.Fatalf("name mask: %s", got)
+	}
+	if got := MaskAccount("6222020202020202001"); got != "6222***********2001" {
+		t.Fatalf("account mask: %s", got)
+	}
+}