scripts: record the new pinned findOne double in the engine-double ledger

check:engine-double-contract RETAINED verdict for
protocol.app-package-id-key.test.ts: one new pinned findOne double, recorded
with --write (no seam lost).

Claude-Session: https://claude.ai/code/session_0121ooBYRmS8ziFXm9ai5YHm
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

scripts/engine-double-contract.pinned.json

@@ -261,6 +261,11 @@
       "verb": "update",
       "pinned": 1
     },
+    {
+      "file": "packages/metadata-protocol/src/protocol.app-package-id-key.test.ts",
+      "verb": "findOne",
+      "pinned": 1
+    },
     {
       "file": "packages/metadata-protocol/src/protocol.audit-field-governance.test.ts",
       "verb": "delete",