exp: 轮次35——FP16/BF16与流水线复用都被实测否掉，f32认证需先抬eps到2e-4

- 显卡精度档（B=1,K=8,steps=1）：推理 FP32 7.68 / FP16 8.31 / BF16 8.58 ms，整周期不变而FP16 P99 46.6→55.6；
  动作偏差 FP16 0.0050°、BF16 0.0377° ⇒ 该批量下不是算力受限，保持 FP32
- float32 认证：48段×9点×15组对的间隙差 max 1.32e-4 mm（有1例高估）→ 现 eps=1e-4 已被越界，要用需 ≥2e-4；
  判据结果两边一致（各24接受、0 仅f32安全、0 符号翻转），暂不放宽 dtype 守卫
- 流水线复用特征间隙：第一版42.1→31.8ms 但等价性检查不过（我取缓存行索引取错，差3.19mm）；
  修正后只剩 −3.1ms 且缓存行与新算差 6.3e-5mm（不同 batch 的结合序）⇒ 放弃
- 顺带修掉轮次34日志里重复的章节标题

docs/experiment_round34_precision_ab.json

@@ -0,0 +1,58 @@
+{
+  "device": "NVIDIA GeForce RTX 3090",
+  "torch": "2.10.0+cu130",
+  "K": 8,
+  "steps": 1,
+  "B": 1,
+  "act_scale": 1.0,
+  "inference": {
+    "fp32": {
+      "p50": 7.681,
+      "p95": 9.426,
+      "p99": 10.631,
+      "max": 15.837
+    },
+    "fp16": {
+      "p50": 8.309,
+      "p95": 10.791,
+      "p99": 12.031,
+      "max": 12.322
+    },
+    "bf16": {
+      "p50": 8.577,
+      "p95": 11.057,
+      "p99": 14.174,
+      "max": 17.1
+    }
+  },
+  "cycle": {
+    "fp32": {
+      "p50": 36.507,
+      "p95": 43.688,
+      "p99": 46.568,
+      "max": 50.598
+    },
+    "fp16": {
+      "p50": 36.162,
+      "p95": 50.43,
+      "p99": 55.598,
+      "max": 57.043
+    }
+  },
+  "output_deviation": {
+    "fp16": {
+      "act_max_abs": 0.002096,
+      "act_p99_abs": 0.001059,
+      "deg_max_abs": 0.005,
+      "deg_p99_abs": 0.00219,
+      "would_change_execution_order": false
+    },
+    "bf16": {
+      "act_max_abs": 0.017171,
+      "act_p99_abs": 0.012661,
+      "deg_max_abs": 0.03766,
+      "deg_p99_abs": 0.03008,
+      "would_change_execution_order": true
+    }
+  }
+}