test(contrib/drivers/mysql): add Lock/Omit/Cache/Batch tests (gogf#4706)

## Summary
- Add Lock/LockUpdate/LockShared tests
- Add OmitNil/OmitEmpty/OmitNilData tests
- Add Cache mechanism tests
- Add Batch operation tests

**Test coverage added:** ~34 test functions across 4 files

Ref gogf#4689

## Test plan
```bash
cd contrib/drivers/mysql
go test -v -run "TestModel_Lock|TestModel_Omit|TestModel_Cache|TestModel_Batch"
```

Author: lingcoder

contrib/drivers/mysql/mysql_z_unit_feature_batch_test.go

@@ -0,0 +1,337 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package mysql_test
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"github.com/gogf/gf/v2/database/gdb"
+	"github.com/gogf/gf/v2/frame/g"
+	"github.com/gogf/gf/v2/test/gtest"
+)
+
+// Test_Model_Batch_Insert tests batch insert with different batch sizes
+func Test_Model_Batch_Insert(t *testing.T) {
+	table := createTable()
+	defer dropTable(table)
+
+	gtest.C(t, func(t *gtest.T) {
+		// Prepare data for batch insert
+		data := g.Slice{}
+		for i := 1; i <= 10; i++ {
+			data = append(data, g.Map{
+				"id":       i,
+				"passport": fmt.Sprintf("batch_user_%d", i),
+				"password": fmt.Sprintf("batch_pass_%d", i),
+				"nickname": fmt.Sprintf("batch_name_%d", i),
+			})
+		}
+
+		// Batch insert with batch size 3
+		result, err := db.Model(table).Batch(3).Data(data).Insert()
+		t.AssertNil(err)
+		n, _ := result.RowsAffected()
+		t.Assert(n, 10)
+
+		// Verify all records were inserted
+		count, err := db.Model(table).Count()
+		t.AssertNil(err)
+		t.Assert(count, 10)
+
+		// Verify specific records
+		one, err := db.Model(table).Where("id", 1).One()
+		t.AssertNil(err)
+		t.Assert(one["passport"], "batch_user_1")
+
+		one, err = db.Model(table).Where("id", 10).One()
+		t.AssertNil(err)
+		t.Assert(one["passport"], "batch_user_10")
+	})
+}
+
+// Test_Model_Batch_Replace tests batch replace operation
+func Test_Model_Batch_Replace(t *testing.T) {
+	table := createTable()
+	defer dropTable(table)
+
+	gtest.C(t, func(t *gtest.T) {
+		// Initial insert
+		data := g.Slice{}
+		for i := 1; i <= 5; i++ {
+			data = append(data, g.Map{
+				"id":       i,
+				"passport": fmt.Sprintf("original_%d", i),
+			})
+		}
+		_, err := db.Model(table).Data(data).Insert()
+		t.AssertNil(err)
+
+		// Batch replace with overlapping ids
+		replaceData := g.Slice{}
+		for i := 3; i <= 8; i++ {
+			replaceData = append(replaceData, g.Map{
+				"id":       i,
+				"passport": fmt.Sprintf("replaced_%d", i),
+				"nickname": fmt.Sprintf("new_name_%d", i),
+			})
+		}
+		result, err := db.Model(table).Batch(2).Data(replaceData).Replace()
+		t.AssertNil(err)
+		n, _ := result.RowsAffected()
+		t.AssertGT(n, 0)
+
+		// Verify replaced records
+		one, err := db.Model(table).Where("id", 3).One()
+		t.AssertNil(err)
+		t.Assert(one["passport"], "replaced_3")
+		t.Assert(one["nickname"], "new_name_3")
+
+		// Verify new records
+		one, err = db.Model(table).Where("id", 8).One()
+		t.AssertNil(err)
+		t.Assert(one["passport"], "replaced_8")
+
+		// Verify total count
+		count, err := db.Model(table).Count()
+		t.AssertNil(err)
+		t.Assert(count, 8) // ids 1-8
+	})
+}
+
+// Test_Model_Batch_Save tests batch save operation
+func Test_Model_Batch_Save(t *testing.T) {
+	table := createTable()
+	defer dropTable(table)
+
+	gtest.C(t, func(t *gtest.T) {
+		// Initial data
+		data := g.Slice{}
+		for i := 1; i <= 5; i++ {
+			data = append(data, g.Map{
+				"id":       i,
+				"passport": fmt.Sprintf("save_user_%d", i),
+			})
+		}
+		_, err := db.Model(table).Data(data).Insert()
+		t.AssertNil(err)
+
+		// Batch save with overlapping and new ids
+		saveData := g.Slice{}
+		for i := 3; i <= 8; i++ {
+			saveData = append(saveData, g.Map{
+				"id":       i,
+				"passport": fmt.Sprintf("saved_%d", i),
+				"nickname": fmt.Sprintf("save_name_%d", i),
+			})
+		}
+		result, err := db.Model(table).Batch(3).Data(saveData).Save()
+		t.AssertNil(err)
+		n, _ := result.RowsAffected()
+		t.AssertGT(n, 0)
+
+		// Verify updated records
+		one, err := db.Model(table).Where("id", 3).One()
+		t.AssertNil(err)
+		t.Assert(one["passport"], "saved_3")
+
+		// Verify inserted records
+		one, err = db.Model(table).Where("id", 8).One()
+		t.AssertNil(err)
+		t.Assert(one["passport"], "saved_8")
+
+		// Verify total count
+		count, err := db.Model(table).Count()
+		t.AssertNil(err)
+		t.Assert(count, 8)
+	})
+}
+
+// Test_Model_Batch_LargeBatch tests batch operation with large dataset
+func Test_Model_Batch_LargeBatch(t *testing.T) {
+	table := createTable()
+	defer dropTable(table)
+
+	gtest.C(t, func(t *gtest.T) {
+		// Prepare 1000+ records
+		data := g.Slice{}
+		totalRecords := 1500
+		for i := 1; i <= totalRecords; i++ {
+			data = append(data, g.Map{
+				"id":       i,
+				"passport": fmt.Sprintf("large_user_%d", i),
+				"nickname": fmt.Sprintf("large_name_%d", i),
+			})
+		}
+
+		// Batch insert with batch size 100
+		result, err := db.Model(table).Batch(100).Data(data).Insert()
+		t.AssertNil(err)
+		n, _ := result.RowsAffected()
+		t.Assert(n, totalRecords)
+
+		// Verify count
+		count, err := db.Model(table).Count()
+		t.AssertNil(err)
+		t.Assert(count, totalRecords)
+
+		// Verify first and last records
+		one, err := db.Model(table).Where("id", 1).One()
+		t.AssertNil(err)
+		t.Assert(one["passport"], "large_user_1")
+
+		one, err = db.Model(table).Where("id", totalRecords).One()
+		t.AssertNil(err)
+		t.Assert(one["passport"], fmt.Sprintf("large_user_%d", totalRecords))
+	})
+}
+
+// Test_Model_Batch_EmptyBatch tests batch operation with empty data
+func Test_Model_Batch_EmptyBatch(t *testing.T) {
+	table := createTable()
+	defer dropTable(table)
+
+	gtest.C(t, func(t *gtest.T) {
+		// Empty slice
+		data := g.Slice{}
+
+		// Batch insert with empty data should return error
+		_, err := db.Model(table).Batch(10).Data(data).Insert()
+		t.AssertNE(err, nil)
+		t.AssertIN(err.Error(), "data list cannot be empty")
+
+		// Verify no records inserted
+		count, err := db.Model(table).Count()
+		t.AssertNil(err)
+		t.Assert(count, 0)
+	})
+}
+
+// Test_Model_Batch_SingleRecord tests batch operation with single record
+func Test_Model_Batch_SingleRecord(t *testing.T) {
+	table := createTable()
+	defer dropTable(table)
+
+	gtest.C(t, func(t *gtest.T) {
+		// Single record batch insert
+		data := g.Slice{
+			g.Map{
+				"id":       1,
+				"passport": "single_user",
+				"nickname": "single_name",
+			},
+		}
+
+		result, err := db.Model(table).Batch(10).Data(data).Insert()
+		t.AssertNil(err)
+		n, _ := result.RowsAffected()
+		t.Assert(n, 1)
+
+		// Verify the record
+		one, err := db.Model(table).Where("id", 1).One()
+		t.AssertNil(err)
+		t.Assert(one["passport"], "single_user")
+		t.Assert(one["nickname"], "single_name")
+	})
+}
+
+// Test_Model_Batch_VsBatch tests performance comparison between different batch sizes
+func Test_Model_Batch_VsBatch(t *testing.T) {
+	table := createTable()
+	defer dropTable(table)
+
+	gtest.C(t, func(t *gtest.T) {
+		// Prepare data
+		data := g.Slice{}
+		for i := 1; i <= 100; i++ {
+			data = append(data, g.Map{
+				"id":       i,
+				"passport": fmt.Sprintf("perf_user_%d", i),
+			})
+		}
+
+		// Test with batch size 1
+		result, err := db.Model(table).Batch(1).Data(data).Insert()
+		t.AssertNil(err)
+		n, _ := result.RowsAffected()
+		t.Assert(n, 100)
+
+		// Clean up
+		_, err = db.Model(table).Where("1=1").Delete()
+		t.AssertNil(err)
+
+		// Test with batch size 10
+		result, err = db.Model(table).Batch(10).Data(data).Insert()
+		t.AssertNil(err)
+		n, _ = result.RowsAffected()
+		t.Assert(n, 100)
+
+		// Clean up
+		_, err = db.Model(table).Where("1=1").Delete()
+		t.AssertNil(err)
+
+		// Test with batch size 50
+		result, err = db.Model(table).Batch(50).Data(data).Insert()
+		t.AssertNil(err)
+		n, _ = result.RowsAffected()
+		t.Assert(n, 100)
+
+		// All batch sizes should produce same result
+		count, err := db.Model(table).Count()
+		t.AssertNil(err)
+		t.Assert(count, 100)
+	})
+}
+
+// Test_Model_Batch_WithTransaction tests batch operation within transaction
+func Test_Model_Batch_WithTransaction(t *testing.T) {
+	table := createTable()
+	defer dropTable(table)
+
+	gtest.C(t, func(t *gtest.T) {
+		data := g.Slice{}
+		for i := 1; i <= 50; i++ {
+			data = append(data, g.Map{
+				"id":       i,
+				"passport": fmt.Sprintf("tx_batch_%d", i),
+			})
+		}
+
+		// Test commit
+		err := db.Transaction(ctx, func(ctx context.Context, tx gdb.TX) error {
+			result, err := tx.Model(table).Batch(10).Data(data).Insert()
+			t.AssertNil(err)
+			n, _ := result.RowsAffected()
+			t.Assert(n, 50)
+			return nil
+		})
+		t.AssertNil(err)
+
+		// Verify commit
+		count, err := db.Model(table).Count()
+		t.AssertNil(err)
+		t.Assert(count, 50)
+
+		// Clean up
+		_, err = db.Model(table).Where("1=1").Delete()
+		t.AssertNil(err)
+
+		// Test rollback
+		err = db.Transaction(ctx, func(ctx context.Context, tx gdb.TX) error {
+			_, err := tx.Model(table).Batch(10).Data(data).Insert()
+			t.AssertNil(err)
+			return fmt.Errorf("rollback test")
+		})
+		t.AssertNE(err, nil)
+
+		// Verify rollback - no records should exist
+		count, err = db.Model(table).Count()
+		t.AssertNil(err)
+		t.Assert(count, 0)
+	})
+}