fix(soak): fix NameError 'm' in rate_limited warning block

Made-with: Cursor

ops/scripts/matrix_bridge_soak.py

@@ -405,9 +405,9 @@ async def run_soak(
             "— possible SQLite write pressure (Bottleneck #2)"
         )
     # Rate-limited warning (not a failure, but surfaced prominently)
-    rl_delta = m.get("rate_limited", 0)
+    rl_delta = report["metrics_delta"].get("rate_limited", 0)
     if rl_delta > 0:
-        rl_pct = rl_delta / s["total_messages"] * 100
+        rl_pct = rl_delta / report["summary"]["total_messages"] * 100
         report["warnings"] = report.get("warnings", [])
         report["warnings"].append(
             f"rate_limited={rl_delta:.0f} ({rl_pct:.0f}% of messages) — "