chore(ledger): wdacc（F2 按位分账）合入后回填台账/凭证/覆盖率

task/wdacc-bits 合入（merge 66f862e）：stall/停喂判据改任一必需位自身连击
≥8 窗；复合串窗误升级（大窗 16:24/16:28 型）结构性消失，MISS start 降级为
诊断行；真停摆最坏到复位 +0.7s，V2 判据不变。@build 0/0：Code=224,768 /
ER_IROM1 249,408 / RW=1,328 / ZI=135,096，lane-f 申报（Code +80B、ZI +8、
BSS s_miss_bits[9] +9B）一致，--no-verify 欠账清。覆盖率基线复算；凭证重盖。

scripts/size_attestation.json

@@ -1,17 +1,17 @@
 {
-  "built_at": "2026-10-25T15:47:11+08:00",
-  "fingerprint": "8d724896ffc95f322041c305a0fbf6704f72bb46fb56367d67c49d14d81074f0",
+  "built_at": "2026-10-25T18:03:15+08:00",
+  "fingerprint": "e05ca262a6f07c2bf7ca2a5927cf0801af0442a2c542f10428941beafbbc3481",
   "fingerprint_files": 1422,
   "fingerprint_source": "git-index",
   "gated_regions": [
     "RW_IRAM1",
     "RW_CCM"
   ],
-  "git_head": "498cc60b9d617ba24528622ba9ef69809d90225e",
+  "git_head": "66f862e7705d6b4e27816eecd4e47c9d2d83b527",
   "map": "MDK-ARM/STM32F407-Demo/STM32F407-Demo.map",
-  "map_mtime": 1792914282,
+  "map_mtime": 1792922569,
   "pct": {
-    "ER_IROM1": 23.78,
+    "ER_IROM1": 23.79,
     "RW_CCM": 87.89,
     "RW_IRAM1": 60.27,
     "UNINIT_CCM": 18.75
@@ -19,7 +19,7 @@
   "regions": {
     "ER_IROM1": {
       "max": 1048576,
-      "size": 249328
+      "size": 249408
     },
     "RW_CCM": {
       "max": 65280,
@@ -27,7 +27,7 @@
     },
     "RW_IRAM1": {
       "max": 131072,
-      "size": 78992
+      "size": 79000
     },
     "UNINIT_CCM": {
       "max": 256,
@@ -37,10 +37,10 @@
   "schema": 2,
   "scope_note": "\u540c\u7801\u51ed\u8bc1\uff1a\u6307\u7eb9\u8986\u76d6\u56fa\u4ef6\u4f53\u79ef\u76f8\u5173\u6e90\u7801\uff0c\u53e3\u5f84\u89c1\u672c\u811a\u672c docstring",
   "sizes": {
-    "code": 224688,
+    "code": 224768,
     "ro_data": 24640,
     "rw_data": 1328,
-    "zi_data": 135088
+    "zi_data": 135096
   },
   "threshold_pct": 92.0,
   "worktree_dirt_at_stamp": 0,