chore: record the new batch causal-row pin file in the engine-double ledger

Regenerated with `node scripts/check-engine-double-contract.mjs --write`:
3 rows added, 0 lost, all naming the new pin file.

Claude-Session: https://claude.ai/code/session_01NcPSwnmJHczmTu6FG7NMjE
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

scripts/engine-double-contract.pinned.json

@@ -266,6 +266,21 @@
       "verb": "update",
       "pinned": 2
     },
+    {
+      "file": "packages/metadata-protocol/src/protocol.batch-causal-row.test.ts",
+      "verb": "delete",
+      "pinned": 1
+    },
+    {
+      "file": "packages/metadata-protocol/src/protocol.batch-causal-row.test.ts",
+      "verb": "findOne",
+      "pinned": 2
+    },
+    {
+      "file": "packages/metadata-protocol/src/protocol.batch-causal-row.test.ts",
+      "verb": "update",
+      "pinned": 2
+    },
     {
       "file": "packages/metadata-protocol/src/protocol.batch-not-attempted.test.ts",
       "verb": "delete",