[fix][store] Scalar only support coprocessor v1

Author: LiuRuoyu01

src/coprocessor/coprocessor_scalar.cc

@@ -103,7 +103,7 @@ butil::Status CoprocessorScalar::Filter(const pb::common::VectorScalardata& scal
 
   std::unique_ptr<std::vector<expr::Operand>> result_operand_ptr;
 
-  status = DoRelExprCore(0x02, original_record, result_operand_ptr);
+  status = DoRelExprCore(default_scalar_codec_version_, original_record, result_operand_ptr);
   if (!status.ok()) {
     DINGO_LOG(ERROR) << status.error_cstr();
     return status;

src/coprocessor/coprocessor_scalar.h

@@ -18,6 +18,7 @@
 #include <serial/schema/base_schema.h>
 
 #include <any>
+#include <cstdint>
 #include <vector>
 
 #include "butil/status.h"
@@ -59,6 +60,7 @@ class CoprocessorScalar : public CoprocessorV2 {
   static bvar::Adder<uint64_t> bvar_coprocessor_v2_filter_scalar_running_num;
   static bvar::Adder<uint64_t> bvar_coprocessor_v2_filter_scalar_total_num;
   static bvar::LatencyRecorder coprocessor_v2_filter_scalar_latency;
+  const int default_scalar_codec_version_{1};
 };
 
 }  // namespace dingodb