feat: add epoch event stream to aggregate id

tests/store/create-snapshot.ts

@@ -1,6 +1,5 @@
 import { assertEquals, assertNotEquals, assertObjectMatch } from "@std/assert";
 import { it } from "@std/testing/bdd";
-import { nanoid } from "nanoid";
 
 import type { Events } from "../mocks/events.ts";
 import { userReducer } from "../mocks/user-reducer.ts";
@@ -9,7 +8,7 @@ import { describe } from "../utilities/describe.ts";
 export default describe<Events>(".createSnapshot", (getEventStore) => {
   it("should create a new snapshot", async () => {
     const { store } = await getEventStore();
-    const stream = nanoid();
+    const stream = crypto.randomUUID();
 
     await store.pushEvent(
       store.event({