chore(rest): record the label pins' engine double in the pinned ledger

`check:engine-double-contract --write` adds the one `findOne` double the
new route-level pin declares; no other row moves.

Claude-Session: https://claude.ai/code/session_018t6a5rvqPRvEDMCVVW9kYT
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

scripts/engine-double-contract.pinned.json

@@ -3831,6 +3831,11 @@
       "verb": "update",
       "pinned": 1
     },
+    {
+      "file": "packages/rest/src/meta-view-label-not-invented.test.ts",
+      "verb": "findOne",
+      "pinned": 1
+    },
     {
       "file": "packages/rest/src/public-form-routes.stored-row.test.ts",
       "verb": "delete",