remove direct indexes in vectors from debug output (#1648)

Author: adameat

ydb/core/graph/shard/backends.cpp

@@ -362,11 +362,11 @@ bool TLocalBackend::DownsampleData(NTabletFlatExecutor::TTransactionContext& txc
                             }
                         }
                         BLOG_TRACE("Normalizing " << values.Timestamps.size() << " values from " << values.Timestamps.front().Seconds()
-                            << " to " << values.Timestamps.back().Seconds() << " values " << values.Values[0].front() << " .. " << values.Values[0].back());
+                            << " to " << values.Timestamps.back().Seconds());
                         NormalizeAndDownsample(values, 1);
                     }
                     if (!values.Timestamps.empty()) {
-                        BLOG_TRACE("Result time is " << values.Timestamps.front().Seconds() << " value is " << values.Values.front()[0]);
+                        BLOG_TRACE("Result time is " << values.Timestamps.front().Seconds());
                         for (ui64 id = 0; id < values.Values.size(); ++id) {
                             db.Table<Schema::MetricsValues>().Key(values.Timestamps.front().Seconds(), id).Update<Schema::MetricsValues::Value>(values.Values.front()[id]);
                         }
@@ -395,11 +395,11 @@ bool TLocalBackend::DownsampleData(NTabletFlatExecutor::TTransactionContext& txc
 
     if (values.Timestamps.size() > 1) {
         BLOG_TRACE("Normalizing " << values.Timestamps.size() << " values from " << values.Timestamps.front().Seconds()
-            << " to " << values.Timestamps.back().Seconds() << " values " << values.Values[0].front() << " .. " << values.Values[0].back());
+            << " to " << values.Timestamps.back().Seconds());
         NormalizeAndDownsample(values, 1);
     }
     if (!values.Timestamps.empty()) {
-        BLOG_TRACE("Result time is " << values.Timestamps.front().Seconds() << " value is " << values.Values.front()[0]);
+        BLOG_TRACE("Result time is " << values.Timestamps.front().Seconds());
         for (ui64 id = 0; id < values.Values.size(); ++id) {
             db.Table<Schema::MetricsValues>().Key(values.Timestamps.front().Seconds(), id).Update<Schema::MetricsValues::Value>(values.Values.front()[id]);
         }