feat(rete): add append-only event log with monotonic sequence (P3.1)

eslint.config.js

@@ -34,5 +34,14 @@ export default tseslint.config(
         },
       ],
     },
+  },
+  // EventLog is a transcript, not rule logic — wall-clock timestamps
+  // are intentional here (see SPEC.md §Rete II Reference Target and
+  // eventlog.ts header). Carve it out from the RHS-purity Date ban.
+  {
+    files: ["packages/rete/src/eventlog.ts"],
+    rules: {
+      "no-restricted-globals": "off",
+    },
   }
 );