doc: clarify the meaning of bench example comments

src/bench/cluster_linearize.cpp

@@ -294,6 +294,13 @@ static void MergeLinearizations99TxWorstCase(benchmark::Bench& bench) { BenchMer
 // selecting for ones that take many iterations (after the introduction of some but not all
 // linearization algorithm optimizations).
 
+// For each bench example, the comment above it indicates:
+// 1. The timestamp when the example was generated during the simulation.
+// 2. The number of transactions in the cluster.
+// 3. The minimum and maximum iterations observed after:
+//    i) Running Linearize with 10 different RNG seeds.
+//    ii) Running LIMO using the cluster's optimal linearization.
+
 /* 2023-05-05T23:12:21Z 71, 521780, 543141,*/
 static constexpr auto BENCH_EXAMPLE_00 = "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"_hex_u8;
 /* 2023-12-06T09:30:01Z 81, 141675, 647053,*/