✨ feat(sync): 扩展跨库迁移自动建表能力

- 新增 MySQL、PG-like、ClickHouse、MongoDB 同类库迁移规划器
- 支持可映射库对自动建表、补字段及兼容索引迁移
- 修复 MongoDB 创建集合时建表 SQL 为空的执行判断
- 避免 PG-like 主键索引重复迁移并保留默认值表达式
- 更新 Data Sync 自动建表能力提示与回归测试
Refs #465

internal/sync/migration_kernel_router_test.go

@@ -102,6 +102,91 @@ func TestResolveMigrationPlanner_UsesPGLikeMySQLPlannerForKingbaseToMySQL(t *tes
 	}
 }
 
+func TestResolveMigrationPlanner_UsesMySQLMySQLPlannerForMySQLToMySQL(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mysql"},
+			TargetConfig: connection.ConnectionConfig{Type: "mysql"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "mysql-mysql-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
+func TestResolveMigrationPlanner_UsesPGLikePGLikePlannerForPostgresToKingbase(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "postgres"},
+			TargetConfig: connection.ConnectionConfig{Type: "kingbase"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "pglike-pglike-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
+func TestResolveMigrationPlanner_DoesNotUsePGLikePGLikePlannerForPostgresToDuckDB(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "postgres"},
+			TargetConfig: connection.ConnectionConfig{Type: "duckdb"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() == "pglike-pglike-planner" {
+		t.Fatalf("duckdb should not use pglike same-family planner")
+	}
+}
+
+func TestResolveMigrationPlanner_UsesClickHouseClickHousePlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "clickhouse"},
+			TargetConfig: connection.ConnectionConfig{Type: "clickhouse"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "clickhouse-clickhouse-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
+func TestResolveMigrationPlanner_UsesMongoMongoPlanner(t *testing.T) {
+	t.Parallel()
+
+	planner := resolveMigrationPlanner(MigrationBuildContext{
+		Config: SyncConfig{
+			SourceConfig: connection.ConnectionConfig{Type: "mongodb"},
+			TargetConfig: connection.ConnectionConfig{Type: "mongodb"},
+		},
+	})
+	if planner == nil {
+		t.Fatalf("expected planner")
+	}
+	if planner.Name() != "mongo-mongo-planner" {
+		t.Fatalf("unexpected planner: %s", planner.Name())
+	}
+}
+
 func TestResolveMigrationPlanner_UsesMySQLPGLikePlannerForMySQLToPostgres(t *testing.T) {
 	t.Parallel()