fix(auth): pin native auth storage operations

backend/test/fixtures/oidc-state-consumer.mts

@@ -1,4 +1,5 @@
 import { createFileAuthSessionStore } from "../../src/auth/session-store.js";
+import { createFixturePosixAuthStorageBridge } from "./posix-auth-storage-bridge.mjs";
 
 const root = process.env.THT_TEST_SESSION_ROOT;
 const state = process.env.THT_TEST_OIDC_STATE;
@@ -9,7 +10,9 @@ process.send("ready");
 process.once("message", async (message) => {
   if (message !== "consume") process.exit(3);
   try {
-    const record = await createFileAuthSessionStore(root).consumeOidcState(state);
+    const record = await createFileAuthSessionStore(root, undefined, {
+      posixStorageBridge: createFixturePosixAuthStorageBridge(),
+    }).consumeOidcState(state);
     process.send?.({ consumed: record !== undefined });
     process.exit(0);
   } catch {