fix(sim-bench): raise drift-check floor to 10ms (stop CI flake) (#30)

Co-authored-by: Aaron D. Lee <himself@adlee.work>
Co-committed-by: Aaron D. Lee <himself@adlee.work>

crates/rutster-sim/src/thresholds.rs

@@ -226,8 +226,14 @@ mod bench_assertions {
             // — meaningless. The drift check becomes meaningful once
             // MockRealtimeBrain composition lands (post-spearhead
             // refinement; spec §8.6 + §1.2 deferral) and produces
-            // ~60ms kills uniformly. Floor at 1ms; skip below.
-            const DRIFT_CHECK_MIN_KILL_SECS: f64 = 0.001;
+            // ~60ms kills uniformly. Floor at 10ms — safely above the
+            // standalone-wiring first-kill noise (sub-ms on dev,
+            // ~1.24ms observed on a loaded Gitea Actions runner —
+            // flake run #122, 2026-07-06), safely below the ~60ms
+            // meaningful regime. The pre-fix 1ms floor let CI timing
+            // variance push `first` above the gate, firing the
+            // meaningless 16× drift ratio (third ≈ 20ms / first ≈ 1.24ms).
+            const DRIFT_CHECK_MIN_KILL_SECS: f64 = 0.010;
             if first > DRIFT_CHECK_MIN_KILL_SECS {
                 let drift = third / first;
                 assert!(