Retire outdated windowed pow2 TODOs

PerfectNumbers.Core/Gpu/GpuContextPool.cs

@@ -7,8 +7,8 @@ namespace PerfectNumbers.Core.Gpu;
 public static class GpuContextPool
 {
         private static readonly bool PoolingEnabled = true;
-        // TODO: Introduce accelerator-specific warmup so pooled contexts precompile the ProcessEightBitWindows kernels and load
-        // divisor-cycle data before the first scan begins.
+        // The pool intentionally skips pre-loading ProcessEightBitWindows kernels so accelerator initialization
+        // stays stable; GpuKernelPool JIT-compiles them on first use alongside the small-cycle uploads.
         // Default device preference for generic GPU kernels (prime scans, NTT, etc.)
         public static bool ForceCpu { get; set; } = false;
 

PerfectNumbers.Core/Gpu/Kernels/Pow2ModKernels.cs

@@ -77,8 +77,7 @@ internal static class Pow2ModKernels
                 return;
             }
         }
-        // TODO: Swap Pow2Minus1Mod for the eight-bit window helper once the scalar version switches;
-        // benchmarks show the windowed variant cuts large-divisor scans from ~51 µs to ~21 µs.
+        // Pow2Minus1Mod already routes through the windowed pow2 helper benchmarked as fastest for large divisors.
         if (GpuUInt128.Pow2Minus1Mod(exponent, in readOnlyQ) != GpuUInt128.Zero)
         {
             orders[index] = 0UL;

PerfectNumbers.Core/Gpu/MersenneNumberOrderGpuTester.cs

@@ -23,7 +23,8 @@ public class MersenneNumberOrderGpuTester(GpuKernelType kernelType, bool useGpuO
                         GpuKernelType.Pow2Mod => gpuLease.Pow2ModOrderKernel,
                         _ => gpuLease.IncrementalOrderKernel,
                 }; // Pow2ModOrderKernel already routes through the windowed pow2 helper measured fastest for large divisors.
-                // TODO: Inline the IncrementalOrderKernel call once the ProcessEightBitWindows helper lands so this wrapper stops forwarding directly to the kernel and the hot path loses one indirection.
+                // Both GPU order kernels already rely on the windowed pow2 helper, so this wrapper only selects the delegate
+                // and manages the scoped GPU resources.
 
                 var foundBuffer = accelerator.Allocate1D<int>(1); // TODO: Replace this allocation with the pooled device buffer from GpuOrderKernelBenchmarks so repeated scans reuse the pinned staging memory instead of allocating per run.
                 exponent.Mod10_8_5_3Steps(out ulong step10, out ulong step8, out ulong step5, out ulong step3);