♻️ refactor(oceanbase): 完善双协议连接链路

- 抽象 OceanBase 协议解析与运行态参数注入
- 复用 OracleDB 实现 OceanBase Oracle 租户连接能力
- 调整 DDL、schema、SQL 方言和数据源能力判断
- 补充协议优先级、缓存隔离和 RPC 参数测试
- 支持按指定 driver 自动生成 agent revision

internal/app/methods_db_create_statement_test.go

@@ -86,6 +86,18 @@ func TestResolveDDLDBType_CustomDriverAlias(t *testing.T) {
 	}
 }
 
+func TestResolveDDLDBType_OceanBaseOracleProtocol(t *testing.T) {
+	t.Parallel()
+
+	cfg := connection.ConnectionConfig{
+		Type:             "oceanbase",
+		ConnectionParams: "protocol=oracle",
+	}
+	if got := resolveDDLDBType(cfg); got != "oracle" {
+		t.Fatalf("expected OceanBase Oracle protocol to use oracle DDL dialect, got %q", got)
+	}
+}
+
 func TestNormalizeSchemaAndTableByType_PGLikeQuotedQualifiedName(t *testing.T) {
 	t.Parallel()