chore(GWC-31): relabel perf-pass GWC-3x comments to PERF-nn; tracker housekeeping

Sweep code/doc comments citing unregistered GWC-30/GWC-31 (2026-08-15 perf
pass) to PERF-02/PERF-07/PERF-22, keyed to task numbers in
docs/plans/2026-08-15-perf-review-remediation.md; add a PERF-ID register
table to that plan. Genuine cycle-2 GWC-30 citations (gateway-side frame-
reader 4-byte prefix fix in Server/Workers/WorkerFrameReader.cs and its
test) are left untouched.

Add a line to REVIEW-PROCESS.md reserving the GWC/WRK/IPC/SEC/CLI/TST
prefixes for the archreview domain registers.

Tracker housekeeping per archreview/2026-08-19/00-overall.md:
- GWC-16 -> Won't fix (rationale: PERF(followup) comment documents the
  double session lookup as measured-negligible, deliberately not collapsed)
- IPC-08 -> Done (closed by 7c1ea12/a1a38b5; residual tracked as IPC-34)
- IPC-31 -> Done (superseded by GWC-28's write-time sequence stamping)
- TST-06, TST-17 rows refreshed per cycle-3 60-testing-docs-gaps.md
- WRK-31 (and defensively WRK-29/30) registered as reserved/do-not-reuse
  interim IDs burned by e913dab, in both the cycle-2 tracker and the
  cycle-2 worker remediation doc

Flip Batch C to Done in archreview/2026-08-19/remediation/00-tracking.md.

Worker-side files (Worker/Ipc/WorkerFrameReader.cs, WorkerFrameWriter.cs)
are comment-only edits, unverified here (net48 x86, windev-only build).

src/ZB.MOM.WW.MxGateway.Tests/Gateway/Workers/WorkerClientTests.cs

@@ -160,7 +160,7 @@ public sealed class WorkerClientTests
             TestTimeout,
             CancellationToken.None);
 
-        // The timeout also emits a WorkerCancel for the abandoned correlation (GWC-31), which sits
+        // The timeout also emits a WorkerCancel for the abandoned correlation (PERF-07), which sits
         // ahead of the second command on the FIFO pipe; skip it rather than mistaking it for the
         // command this assertion is about.
         WorkerEnvelope secondCommand = await ReadNextCommandAsync(pipePair, timedOutCommand.CorrelationId);
@@ -176,7 +176,7 @@ public sealed class WorkerClientTests
     /// <summary>
     ///     A command timeout abandons the gateway-side wait, but the worker keeps the correlation on
     ///     its single STA queue and would still run it — so the gateway forwards a <c>WorkerCancel</c>
-    ///     for the abandoned correlation id (GWC-31). Without it, a client that retries after a
+    ///     for the abandoned correlation id (PERF-07). Without it, a client that retries after a
     ///     timeout stacks work the worker still intends to execute. Asserted on the wire because the
     ///     cancel is protocol behavior the worker depends on, not an internal detail.
     /// </summary>