refactor: 重构trustlog-sdk目录结构到trustlog/go-trustlog

- 将所有trustlog-sdk文件移动到trustlog/go-trustlog/目录
- 更新README中所有import路径从trustlog-sdk改为go-trustlog
- 更新cookiecutter配置文件中的项目名称
- 更新根目录.lefthook.yml以引用新位置的配置
- 添加go.sum文件到版本控制
- 删除过时的示例文件

这次重构与trustlog-server保持一致的目录结构，
为未来支持多语言SDK（Python、Java等）预留空间。

api/model/config_signer_test.go

@@ -0,0 +1,158 @@
+package model_test
+
+import (
+	"testing"
+
+	_ "github.com/crpt/go-crpt/sm2" // 确保 SM2 已注册
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"go.yandata.net/iod/iod/trustlog-sdk/api/model"
+)
+
+func TestNewConfigSigner_SM2(t *testing.T) {
+	t.Parallel()
+
+	// 生成 SM2 密钥对
+	keyPair, err := model.GenerateSM2KeyPair()
+	require.NoError(t, err)
+
+	privateKeyDER, err := model.MarshalSM2PrivateDER(keyPair.Private)
+	require.NoError(t, err)
+
+	publicKeyDER, err := model.MarshalSM2PublicDER(keyPair.Public)
+	require.NoError(t, err)
+
+	// 创建签名器
+	config := &model.CryptoConfig{
+		SignatureAlgorithm: model.SM2Algorithm,
+	}
+	signer, err := model.NewConfigSigner(privateKeyDER, publicKeyDER, config)
+	require.NoError(t, err)
+	assert.NotNil(t, signer)
+	assert.Equal(t, model.SM2Algorithm, signer.GetAlgorithm())
+}
+
+func TestNewDefaultSigner(t *testing.T) {
+	t.Parallel()
+
+	// 生成 SM2 密钥对
+	keyPair, err := model.GenerateSM2KeyPair()
+	require.NoError(t, err)
+
+	privateKeyDER, err := model.MarshalSM2PrivateDER(keyPair.Private)
+	require.NoError(t, err)
+
+	publicKeyDER, err := model.MarshalSM2PublicDER(keyPair.Public)
+	require.NoError(t, err)
+
+	// 创建默认签名器（应该使用 SM2）
+	signer, err := model.NewDefaultSigner(privateKeyDER, publicKeyDER)
+	require.NoError(t, err)
+	assert.NotNil(t, signer)
+	assert.Equal(t, model.SM2Algorithm, signer.GetAlgorithm())
+}
+
+func TestConfigSigner_SignAndVerify_SM2(t *testing.T) {
+	t.Parallel()
+
+	// 生成密钥对
+	keyPair, err := model.GenerateSM2KeyPair()
+	require.NoError(t, err)
+
+	privateKeyDER, err := model.MarshalSM2PrivateDER(keyPair.Private)
+	require.NoError(t, err)
+
+	publicKeyDER, err := model.MarshalSM2PublicDER(keyPair.Public)
+	require.NoError(t, err)
+
+	// 创建签名器
+	signer, err := model.NewDefaultSigner(privateKeyDER, publicKeyDER)
+	require.NoError(t, err)
+
+	// 签名
+	data := []byte("test data for ConfigSigner")
+	signature, err := signer.Sign(data)
+	require.NoError(t, err)
+	assert.NotEmpty(t, signature)
+
+	// 验证
+	ok, err := signer.Verify(data, signature)
+	require.NoError(t, err)
+	assert.True(t, ok)
+
+	// 验证错误数据
+	wrongData := []byte("wrong data")
+	ok, err = signer.Verify(wrongData, signature)
+	require.NoError(t, err)
+	assert.False(t, ok)
+}
+
+func TestConfigSigner_SignAndVerify_Ed25519(t *testing.T) {
+	t.Parallel()
+
+	// 生成 Ed25519 密钥对
+	config := &model.CryptoConfig{
+		SignatureAlgorithm: model.Ed25519Algorithm,
+	}
+	keyPair, err := model.GenerateKeyPair(config)
+	require.NoError(t, err)
+
+	privateKeyDER, err := keyPair.MarshalPrivateKey()
+	require.NoError(t, err)
+
+	publicKeyDER, err := keyPair.MarshalPublicKey()
+	require.NoError(t, err)
+
+	// 创建签名器
+	signer, err := model.NewConfigSigner(privateKeyDER, publicKeyDER, config)
+	require.NoError(t, err)
+
+	// 签名
+	data := []byte("test data for Ed25519")
+	signature, err := signer.Sign(data)
+	require.NoError(t, err)
+	assert.NotEmpty(t, signature)
+
+	// 验证
+	ok, err := signer.Verify(data, signature)
+	require.NoError(t, err)
+	assert.True(t, ok)
+}
+
+func TestConfigSigner_CompatibleWithSM2Signer(t *testing.T) {
+	t.Parallel()
+
+	// 生成密钥对
+	keyPair, err := model.GenerateSM2KeyPair()
+	require.NoError(t, err)
+
+	privateKeyDER, err := model.MarshalSM2PrivateDER(keyPair.Private)
+	require.NoError(t, err)
+
+	publicKeyDER, err := model.MarshalSM2PublicDER(keyPair.Public)
+	require.NoError(t, err)
+
+	// 使用 ConfigSigner 签名
+	configSigner, err := model.NewDefaultSigner(privateKeyDER, publicKeyDER)
+	require.NoError(t, err)
+
+	data := []byte("test data")
+	signature1, err := configSigner.Sign(data)
+	require.NoError(t, err)
+
+	// 使用 SM2Signer 验证
+	sm2Signer := model.NewSM2Signer(privateKeyDER, publicKeyDER)
+	ok1, err := sm2Signer.Verify(data, signature1)
+	require.NoError(t, err)
+	assert.True(t, ok1, "SM2Signer should verify ConfigSigner's signature")
+
+	// 使用 SM2Signer 签名
+	signature2, err := sm2Signer.Sign(data)
+	require.NoError(t, err)
+
+	// 使用 ConfigSigner 验证
+	ok2, err := configSigner.Verify(data, signature2)
+	require.NoError(t, err)
+	assert.True(t, ok2, "ConfigSigner should verify SM2Signer's signature")
+}