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/adapter/tcp_protocol_test.go

@@ -0,0 +1,166 @@
+package adapter
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestEncodeTCPMessage(t *testing.T) {
+	tests := []struct {
+		name    string
+		msg     *TCPMessage
+		wantErr bool
+	}{
+		{
+			name: "valid data message",
+			msg: &TCPMessage{
+				Type:    MessageTypeData,
+				Topic:   "test-topic",
+				UUID:    "test-uuid-1234",
+				Payload: []byte("test payload"),
+			},
+			wantErr: false,
+		},
+		{
+			name: "valid ack message",
+			msg: &TCPMessage{
+				Type:    MessageTypeAck,
+				Topic:   "",
+				UUID:    "test-uuid-5678",
+				Payload: nil,
+			},
+			wantErr: false,
+		},
+		{
+			name:    "nil message",
+			msg:     nil,
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			data, err := EncodeTCPMessage(tt.msg)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("EncodeTCPMessage() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+
+			if !tt.wantErr && data == nil {
+				t.Error("EncodeTCPMessage() returned nil data")
+			}
+		})
+	}
+}
+
+func TestDecodeTCPMessage(t *testing.T) {
+	// 创建一个测试消息
+	original := &TCPMessage{
+		Type:    MessageTypeData,
+		Topic:   "test-topic",
+		UUID:    "test-uuid-1234",
+		Payload: []byte("test payload data"),
+	}
+
+	// 编码
+	encoded, err := EncodeTCPMessage(original)
+	if err != nil {
+		t.Fatalf("Failed to encode message: %v", err)
+	}
+
+	// 解码
+	reader := bytes.NewReader(encoded)
+	decoded, err := DecodeTCPMessage(reader)
+	if err != nil {
+		t.Fatalf("Failed to decode message: %v", err)
+	}
+
+	// 验证
+	if decoded.Type != original.Type {
+		t.Errorf("Type mismatch: got %v, want %v", decoded.Type, original.Type)
+	}
+	if decoded.Topic != original.Topic {
+		t.Errorf("Topic mismatch: got %v, want %v", decoded.Topic, original.Topic)
+	}
+	if decoded.UUID != original.UUID {
+		t.Errorf("UUID mismatch: got %v, want %v", decoded.UUID, original.UUID)
+	}
+	if !bytes.Equal(decoded.Payload, original.Payload) {
+		t.Errorf("Payload mismatch: got %v, want %v", decoded.Payload, original.Payload)
+	}
+}
+
+func TestEncodeDecodeRoundTrip(t *testing.T) {
+	testCases := []struct {
+		name string
+		msg  *TCPMessage
+	}{
+		{
+			name: "data message with payload",
+			msg: &TCPMessage{
+				Type:    MessageTypeData,
+				Topic:   "persistent://public/default/test",
+				UUID:    "550e8400-e29b-41d4-a716-446655440000",
+				Payload: []byte("Hello, World!"),
+			},
+		},
+		{
+			name: "ack message",
+			msg: &TCPMessage{
+				Type:    MessageTypeAck,
+				Topic:   "",
+				UUID:    "test-uuid",
+				Payload: nil,
+			},
+		},
+		{
+			name: "nack message",
+			msg: &TCPMessage{
+				Type:    MessageTypeNack,
+				Topic:   "",
+				UUID:    "another-uuid",
+				Payload: []byte{},
+			},
+		},
+		{
+			name: "message with large payload",
+			msg: &TCPMessage{
+				Type:    MessageTypeData,
+				Topic:   "test",
+				UUID:    "uuid",
+				Payload: make([]byte, 10000),
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// 编码
+			encoded, err := EncodeTCPMessage(tc.msg)
+			if err != nil {
+				t.Fatalf("Encode failed: %v", err)
+			}
+
+			// 解码
+			reader := bytes.NewReader(encoded)
+			decoded, err := DecodeTCPMessage(reader)
+			if err != nil {
+				t.Fatalf("Decode failed: %v", err)
+			}
+
+			// 验证所有字段
+			if decoded.Type != tc.msg.Type {
+				t.Errorf("Type: got %v, want %v", decoded.Type, tc.msg.Type)
+			}
+			if decoded.Topic != tc.msg.Topic {
+				t.Errorf("Topic: got %v, want %v", decoded.Topic, tc.msg.Topic)
+			}
+			if decoded.UUID != tc.msg.UUID {
+				t.Errorf("UUID: got %v, want %v", decoded.UUID, tc.msg.UUID)
+			}
+			if !bytes.Equal(decoded.Payload, tc.msg.Payload) {
+				t.Errorf("Payload: got %v, want %v", decoded.Payload, tc.msg.Payload)
+			}
+		})
+	}
+}