fix(ci): address PR #69 review — stale comments, dead CLI flags

- gen_fixtures.rs: version comments now say PROTOCOL_VERSION instead
  of hardcoded 14, so they stay correct across bumps
- run-ipc-benchmark: remove --iterations flag that was parsed but
  never forwarded to the Rust test (compile-time constant governs)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/tests/gen_fixtures.rs

@@ -290,7 +290,7 @@ fn generate_msgpack_fixtures() {
 
     // === #271 fixtures: named fixtures for cross-language Layer 1 testing ===
 
-    // snapshot_minimal: version=14, tick=0, one Player entity, all optionals absent
+    // snapshot_minimal: version=PROTOCOL_VERSION, tick=0, one Player entity, all optionals absent
     let snapshot_minimal = fixture_snapshot(
         0,
         vec![VisibleEntity {
@@ -310,7 +310,7 @@ fn generate_msgpack_fixtures() {
         &rmp_serde::to_vec_named(&snapshot_minimal).unwrap(),
     );
 
-    // snapshot_full: version=14, tick=42, monologue + dialogue + inventory + POIs + KG dump
+    // snapshot_full: version=PROTOCOL_VERSION, tick=42, monologue + dialogue + inventory + POIs + KG dump
     let snapshot_full = ObserverSnapshot {
         version: PROTOCOL_VERSION,
         tick: 42,

tests/run-ipc-benchmark

@@ -14,14 +14,10 @@
 # Stdout: {"p50_ms":N,"p95_ms":N,"p99_ms":N,"threshold_ms":5,"passed":true,"rounds":100}
 set -euo pipefail
 
-ITERATIONS=100
 THRESHOLD_MS=5
 
 while [[ $# -gt 0 ]]; do
     case "$1" in
-        --iterations) ITERATIONS="${2:-100}"; shift 2 ;;
-        --iterations=*) ITERATIONS="${1#--iterations=}"; shift ;;
-        --threshold-ms) THRESHOLD_MS="${2:-5}"; shift 2 ;;
         --filter) shift 2 ;;        # ignored — benchmark has no test filter
         --filter=*) shift ;;
         *) echo "Unknown argument: $1" >&2; exit 2 ;;