p70: 启动帧率与渲染基准（真实可复跑数据）

- scripts/bench-p70.sh：两档基准——Kernel --performance-baseline（6000 tick ×3）
  + Desktop xvfb 60s 真实帧循环；scripts/analyze-p70.py 汇总裁决
- Game.fs：LV_FRAME_LOG=1 逐帧日志（墙钟帧间隔 + GC 线程分配增量 + tick/panel），
  仅新增日志，不改渲染/更新逻辑
- P70PerformanceBaselineTests：Pin --performance-baseline final_digest=953775FA…（防漂移）
- 实测：Kernel tps mean=466679 alloc=3032184 gen0/1/2=0/0/0 determinism=PASS；
  Desktop 60s frames=8788 fps=139.3 mean=7.179ms max=33.919ms 掉帧>33.3ms=2
  每帧分配 mean=231KB p95=297KB；dotnet-counters 缺席已如实标注
- Desktop 338/338、Kernel 120/120；Kernel/Sim/渲染口径/字形表未动

1 files changed, 18 insertions, 0 deletions

diff --git a/src/LivingVillage.Kernel.Tests/P70PerformanceBaselineTests.fs b/src/LivingVillage.Kernel.Tests/P70PerformanceBaselineTests.fs
new file mode 100644
index 0000000..ea98f34
--- /dev/null
+++ b/src/LivingVillage.Kernel.Tests/P70PerformanceBaselineTests.fs
@@ -0,0 +1,18 @@
+namespace LivingVillage.Kernel.Tests
+
+open Microsoft.VisualStudio.TestTools.UnitTesting
+open LivingVillage.Headless
+
+/// P70：把 Headless `--performance-baseline`（defaultConfiguration）的最终 digest 钉住，
+/// 作为 Kernel/Sim 数值路径漂移的护栏。与 scripts/bench-p70.sh 的 Kernel 档同一输入。
+[<TestClass>]
+type P70PerformanceBaselineTests () =
+
+    [<TestMethod>]
+    member _.PerformanceBaselineDigestIsPinned () =
+        let world = PerformanceProbe.runSteps PerformanceProbe.defaultConfiguration
+        let digest = PerformanceProbe.worldDigest world
+        printfn "P70 performance baseline digest=%s" digest
+        Assert.AreEqual<string>(
+            "953775FAEB2FDDE97289491AA260BD8D390C571E48A7A13AD2CB6FB7124F7F6C",
+            digest)