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

train_and_score_v6.ps1

@@ -0,0 +1,48 @@
+# Train both v6 routers, then score every router and print the dominance verdict.
+# This is chain_v6 without the encoder wait: it is used once the feature bank has
+# been verified complete by verify_feature_bank.py.
+param(
+    [int]$Steps = 100000,
+    [string[]]$Configs = @('v2_512_v6', 'xl512_v6')
+)
+
+$ErrorActionPreference = 'Stop'
+$Python = 'C:\Users\Administrator\miniconda3\envs\LLM\python.exe'
+$ForkRoot = 'H:\Memory\V2_dpskw'
+$CacheDir = 'H:\Memory\nm_cache\nm_router_v6\feature_cache'
+
+$env:PYTHONPATH = 'H:\Memory'
+Set-Location $ForkRoot
+
+$verification = & $Python -m V2_dpskw.verify_feature_bank --cache-dir $CacheDir --no-update-manifest 2>&1 | Out-String
+if ($verification -notmatch '"complete": true') {
+    throw "feature bank is not complete; refusing to train:`n$verification"
+}
+Write-Output 'feature bank: COMPLETE (verified by full scan)'
+
+& (Join-Path $ForkRoot 'run_router_v6.ps1') -Steps $Steps -Configs $Configs
+if ($LASTEXITCODE -ne 0) { throw "v6 training failed with exit code $LASTEXITCODE" }
+
+$old = 'H:\Memory\dynamic_memory_lab\checkpoints'
+& $Python -m V2_dpskw.eval_router_v5 `
+    --train-file data/router_training_v6/train.jsonl `
+    --eval-file data/router_training_v6/eval.jsonl `
+    --feature-cache $CacheDir `
+    --run "V2-128 deployed(v3)=$old\natural_memory_v2_qwen_router_entities\memory_router_v2.pt" `
+    --run "V2-512 v3 best=$old\natural_memory_v2_router_512\router_best.pt" `
+    --run "V2-512 v3 final=$old\natural_memory_v2_router_512\memory_router_v2.pt" `
+    --run "V2-512 v6 best=$ForkRoot\checkpoints\router_v6_v2_512\router_best.pt" `
+    --run "V2-512 v6 final=$ForkRoot\checkpoints\router_v6_v2_512\memory_router_v2.pt" `
+    --run "XL-512 v6 best=$ForkRoot\checkpoints\router_v6_xl512\router_best.pt" `
+    --run "XL-512 v6 final=$ForkRoot\checkpoints\router_v6_xl512\memory_router_xl.pt" `
+    --output router_scorecard_v6.json --markdown router_scorecard_v6.md
+if ($LASTEXITCODE -ne 0) { throw "scorecard failed with exit code $LASTEXITCODE" }
+
+& $Python -m V2_dpskw.verdict_router_v6 `
+    --scorecard router_scorecard_v6.json `
+    --candidate "XL-512 v6 best" --candidate "XL-512 v6 final" `
+    --candidate "V2-512 v6 best" --candidate "V2-512 v6 final" `
+    --baseline-prefix "V2-128 deployed" --baseline-prefix "V2-512 v3" `
+    --output router_verdict_v6.json --markdown router_verdict_v6.md
+Write-Output ("verdict exit code: {0} (0 = complete dominance, 2 = some axis failed)" -f $LASTEXITCODE)
+Write-Output ("[{0}] train+score complete" -f (Get-Date -Format 'HH:mm:ss'))