chore: fix oxlint errors (#13434)

#### PR Dependency Tree


* **PR #13434** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Style**
* Improved clarity of TypeScript error suppression comments across
various test files and helper scripts. Comments now specify the reasons
for ignoring specific type errors, enhancing code readability for
developers.
* **Chores**
* Updated inline comments without affecting application functionality or
user experience. No changes to features, logic, or test outcomes.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/__tests__/utils/testing-module.ts

@@ -66,7 +66,7 @@ export async function createTestingModule(
   // setting up
   let imports = moduleDef.imports ?? [buildAppModule(globalThis.env)];
   imports =
-    // @ts-expect-error
+    // @ts-expect-error ignore the type error
     imports[0].module?.name === 'AppModule'
       ? imports
       : dedupeModules([