Merge fix/c3-tracker-hygiene: GWC-31 perf-pass comments relabeled PERF-nn, archreview prefixes reserved in REVIEW-PROCESS.md, cycle-1/2 tracker housekeeping (GWC-16 Won't fix, IPC-08/IPC-31 Done, TST-06/17 refreshed, WRK-29..31 reserved)

src/ZB.MOM.WW.MxGateway.Worker/Ipc/WorkerFrameReader.cs

@@ -20,7 +20,7 @@ public sealed class WorkerFrameReader
     private readonly WorkerFrameProtocolOptions _options;
     private readonly Stream _stream;
 
-    // Reused across frames rather than allocated per read (GWC-30). Safe because ReadAsync is
+    // Reused across frames rather than allocated per read (PERF-22). Safe because ReadAsync is
     // single-consumer by construction; the prefix is fully overwritten by every read.
     //
     // The single-consumer invariant has to survive teardown as well as steady state, because a read

src/ZB.MOM.WW.MxGateway.Worker/Ipc/WorkerFrameWriter.cs

@@ -668,10 +668,10 @@ public sealed class WorkerFrameWriter
         // Serialize once into a single pooled buffer that carries the 4-byte length prefix followed
         // by the payload, then issue one stream write. This avoids a second serialization pass, a
         // separate prefix array, a separate prefix write, and any per-frame heap allocation — the
-        // gateway-side writer's GWC-30 shape, now matched on the net48 side. The rented buffer may
-        // be larger than requested, so only the first frameLength bytes are ever written. The buffer
-        // is returned only after this frame's write has completed; the batch flush deferred to the
-        // end of the drain (see DrainQueuedFramesAsync) does not read from it.
+        // gateway-side writer's pooled-buffer shape (PERF-22), now matched on the net48 side. The
+        // rented buffer may be larger than requested, so only the first frameLength bytes are ever
+        // written. The buffer is returned only after this frame's write has completed; the batch
+        // flush deferred to the end of the drain (see DrainQueuedFramesAsync) does not read from it.
         int frameLength = sizeof(uint) + payloadLength;
         byte[] frame = ArrayPool<byte>.Shared.Rent(frameLength);
         try