fix(sessions): guard withSessionStoreLock against undefined storePath (#14717) (openclaw#14755) thanks @lailoo

Verified:
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: lailoo <20536249+lailoo@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/config/sessions/store.ts

@@ -714,6 +714,11 @@ async function withSessionStoreLock<T>(
   fn: () => Promise<T>,
   opts: SessionStoreLockOptions = {},
 ): Promise<T> {
+  if (!storePath || typeof storePath !== "string") {
+    throw new Error(
+      `withSessionStoreLock: storePath must be a non-empty string, got ${JSON.stringify(storePath)}`,
+    );
+  }
   const timeoutMs = opts.timeoutMs ?? 10_000;
   const staleMs = opts.staleMs ?? 30_000;
   // `pollIntervalMs` is retained for API compatibility with older lock options.