queue: record for the mutation study of the write axis (nine cases, nine red, one green control)

Appended at the foot with docs/queue-index.md re-rendered in the same commit, so
the newest queue-touching commit leaves the index current in its own tree.

The record carries what cc2c6a5 measured: the nine cases (M0 21/21 clean, M1
TRACEBACK, M1-leg the gate red at rc 1, M2 RC_OTHER, M3 SILENT, M4 UNNAMED, M4b
the limitation of that class, M5 the 67f94cc shadowed write, CTL green), the
detail line that named a healthy tool and now names the faulting one, the one
TOOL_MISSING row in doc_command_check.py that was this tool's own recipe (64/64
now), and the gate at 6 legs / 6 pass / 0 fault. No Q-item opened or closed; the
open set still reads Q37, Q53, Q64.

docs/queue-index.md

@@ -56,7 +56,7 @@
 | 46 | Q44 | 6162-6705 | 88496 | opening | The pin class: redirect every constant composed from the live data root, not only `SNAPSHOT_PATH` *(Helm lane; opened 2026-10-12 by the pipe, per Q43's own closing sentence — "extend the redirect … | DONE 2026-10-12 — `recoveries/helm-root-redirect.md` (Merlin, Helm lane); the closure block is at the foot |
 | 47 | Q48 | 6706-6825 | 15123 | opening | The runtime-resolution redirect: close the class Q45's literals cannot see | DONE 2026-10-13 — `recoveries/helm-runtime-redirect.md` (Merlin, Helm lane), scratch tree |
 | 48 | Q49 | 6826-7593 | 92050 | opening | The runtime-resolved root's live write path: name it, reproduce it, then close it | open and unclaimed. Opened by the pipe 2026-10-13 |
-| 49 | Q45 | 7594-10484 | 507975 | opening | §9 follow-on — the home-directory channel *(Helm lane; Merlin)* | OPEN — awaiting Alexander's zoom/whole-shop answer; build is the pipe's. |
+| 49 | Q45 | 7594-10502 | 514132 | opening | §9 follow-on — the home-directory channel *(Helm lane; Merlin)* | OPEN — awaiting Alexander's zoom/whole-shop answer; build is the pipe's. |
 
 ## Ids with no `## ` heading
 
@@ -71,9 +71,9 @@ Opened as records inside another section. `line` is the record's own opening lin
 | Q50 | 6990 | 6990 | 46 | Q49 | BULLET+BOLD | BOLD-LEAD |
 | Q51 | 7106 | 7106 | 37 | Q49 | BULLET+BOLD | BOLD-LEAD |
 | Q52 | 7167 | 7167 | 90 | Q49 | BULLET+BOLD | BOLD-LEAD |
-| Q53 | 7292 | 7246 | 147 | Q49 | BULLET+BOLD | BOLD-LEAD |
+| Q53 | 7292 | 7246 | 148 | Q49 | BULLET+BOLD | BOLD-LEAD |
 | Q63 | 9918 | 9909 | 17 | Q45 | BULLET+BOLD | BOLD-LEAD |
-| Q64 | 10308 | 10308 | 10 | Q45 | BULLET+BOLD | BOLD-LEAD |
+| Q64 | 10308 | 10308 | 11 | Q45 | BULLET+BOLD | BOLD-LEAD |
 
 **Not in this document.** Ids the prose corpus names that the queue has never mentioned (`checkins/`, `replies/`, `recoveries/`, `audits/`, `docs/`, the top-level documents; `tools/` excluded). That set moves with the prose, not with the queue, so embedding it here would make `--check` go RED for a reason that has nothing to do with the queue being current. It is reported on demand: `python3 tools/queue_index.py --outside`.
 
@@ -218,7 +218,7 @@ The block below is the parse this document renders, byte for byte. `--check` com
    "form": "BOLD-LEAD",
    "id": "Q53",
    "line": 7292,
-   "refs": 147,
+   "refs": 148,
    "section": "Q49",
    "shape": "BULLET+BOLD"
   },
@@ -236,7 +236,7 @@ The block below is the parse this document renders, byte for byte. `--check` com
    "form": "BOLD-LEAD",
    "id": "Q64",
    "line": 10308,
-   "refs": 10,
+   "refs": 11,
    "section": "Q45",
    "shape": "BULLET+BOLD"
   }
@@ -246,9 +246,9 @@ The block below is the parse this document renders, byte for byte. `--check` com
   "end_line": 8,
   "line": 1
  },
- "queue_bytes": 1400236,
- "queue_lines": 10484,
- "queue_sha256": "d74551c3f747c60c1a4ca71529cf26bf9cd47472963e0420e75231dc083dd329",
+ "queue_bytes": 1406393,
+ "queue_lines": 10502,
+ "queue_sha256": "88948ef446c4171e126a023538f78c1a0df49ea074fe8fca6726f6167f1167c9",
  "sections": [
   {
    "bytes": 3139,
@@ -827,11 +827,11 @@ The block below is the parse this document renders, byte for byte. `--check` com
    "title": "The runtime-resolved root's live write path: name it, reproduce it, then close it"
   },
   {
-   "bytes": 507975,
-   "end_line": 10484,
+   "bytes": 514132,
+   "end_line": 10502,
    "id": "Q45",
    "line": 7594,
-   "lines": 2891,
+   "lines": 2909,
    "role": "opening",
    "role_detail": "",
    "status": "OPEN \u2014 awaiting Alexander's zoom/whole-shop answer; build is the pipe's.",