Clarify cycle stepper reset inlining

PerfectNumbers.Core/EulerPrimeTester.cs

@@ -14,6 +14,9 @@ public sealed class EulerPrimeTester
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public bool IsEulerPrime(ulong n)
     {
+        // TODO: Inline this helper into callers so we skip the wrapper and pass the divisibility check directly to the optimized
+        // prime tester path highlighted in the CPU benchmarks.
         return (n & 3UL) == 1UL && _primeTester.IsPrime(n, CancellationToken.None);
     }
 }
+