Changed warning metric format

`*flow__warnings__count:RSZ-62` -> `:RSZ-0062`

Signed-off-by: Jaehyun Kim <[email protected]>

Author: jhkim-pii

src/utl/src/Logger.cpp

@@ -197,7 +197,7 @@ void Logger::addWarningMetrics()
         warning_type_cnt++;
         log_metric(
             // NOLINTNEXTLINE(misc-include-cleaner)
-            fmt::format("flow__warnings__count:{}-{}", tool_names_[i], j),
+            fmt::format("flow__warnings__count:{}-{:04}", tool_names_[i], j),
             std::to_string(message_counters_[i][j]));
       }
     }

src/utl/test/cpp/TestMetrics.cpp

@@ -38,9 +38,9 @@ TEST(Utl, WarningMetrics)
   // For simplicity, we'll just check for substrings.
   EXPECT_NE(content.find("\"flow__warnings__count\": 11"), std::string::npos);
   EXPECT_NE(content.find("\"flow__errors__count\": 0"), std::string::npos);
-  EXPECT_NE(content.find("\"flow__warnings__count:UTL-20\": 10"),
+  EXPECT_NE(content.find("\"flow__warnings__count:UTL-0020\": 10"),
             std::string::npos);
-  EXPECT_NE(content.find("\"flow__warnings__count:UTL-21\": 1"),
+  EXPECT_NE(content.find("\"flow__warnings__count:UTL-0021\": 1"),
             std::string::npos);
   EXPECT_NE(content.find("\"flow__warnings__type_count\": 2"),
             std::string::npos);