Natural Memory NM2.1: 记忆路由器分叉、数据集缺陷修复与全轴评测证据

- 引入 MemoryRouterXL 与 v5/v6 流式多线程训练/编码管线
- 修复 prepare_memory_router_dataset 候选池重建缺陷（mega 家族 3568x 加速，输出逐字节相同）
- 修复 v5 被破坏的拒答与多跳标签（train 未知样本 319 -> 16319，multi_hop 平均正例 1.00 -> 2.00）
- 同存储预算下 V2-128 v6 逐轴 22/22 通过：Top-1 41.12% -> 94.62%，未知拒答 0.00% -> 100.00%
- 记录三条被实测推翻的显然优化（logits_to_keep=1 反而慢 55%、XL 容量未带来收益）
- 记忆手术跨架构可移植性 14/14，读写关闭时与原生模型逐位相同

extract_gate_scan_summary.py

@@ -0,0 +1,60 @@
+"""Extract the gate-scan summary block from a probe log (quoting-safe helper)."""
+
+from __future__ import annotations
+
+import json
+import re
+import sys
+
+KEYS = [
+    "cases_scanned",
+    "target_record_retracted_or_absent",
+    "target_record_active",
+    "records_per_case",
+    "active_records_min",
+    "active_records_max",
+    "cases_with_direct_records",
+    "cases_with_address_hits",
+    "cases_with_lexical_hits",
+    "v2_gate_open_pct_deployed_router",
+    "v2_gate_open_pct_random_router_copies",
+    "stop_reasons",
+    "legacy_prefix_used_pct",
+]
+
+
+def main() -> int:
+    path = sys.argv[1]
+    text = open(path, encoding="utf-8", errors="replace").read()
+    decoder = json.JSONDecoder()
+    found = []
+    for match in re.finditer(r"\{", text):
+        try:
+            obj, _ = decoder.raw_decode(text[match.start():])
+        except ValueError:
+            continue
+        if isinstance(obj, dict) and "target_record_active" in obj:
+            found.append(obj)
+    if not found:
+        print("no summary block with target_record_active found; tail follows")
+        print(text[-1200:])
+        return 1
+    summary = found[-1]
+    print(json.dumps(summary, ensure_ascii=False, indent=2))
+    print()
+    correct = 0
+    total = 0
+    for match in re.finditer(r'"correct": (true|false)', text):
+        total += 1
+        correct += 1 if match.group(1) == "true" else 0
+    if total:
+        print("per-case correct: %d/%d = %.2f%%" % (correct, total, 100.0 * correct / total))
+    print()
+    for key in KEYS:
+        if key in summary:
+            print("  %-44s = %s" % (key, json.dumps(summary[key], ensure_ascii=False)))
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())