Update typing in the s3 uploader

[mshriver]

Summary by Sourcery

Adjust S3 uploader tests to use more precise typings for mocked file system reads.

Enhancements:

• Refine Jest spy typings for fs.promises.readdir in S3 uploader tests to match the string[] overload.

Tests:

• Simplify mocked readdir return type in S3 uploader tests by returning a string array directly instead of casting to Dirent[].

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Refines Jest mocking in the S3 uploader tests by giving readdir spies precise promise and argument typings and returning a correctly typed file name array, improving type safety and readability.

File-Level Changes

Change	Details	Files
Tightened Jest spy typing for fs.promises.readdir in S3Uploader tests to match the string[] overload and simplified the mocked return value.	Cast the jest.spyOn call for fs.promises.readdir to a SpyInstance that returns Promise<string[]> with a single PathLike argument to satisfy TypeScript overload resolution. Updated the mocked resolved value for readdir from an fs.Dirent[]-cast array to a plain string[] of file names, matching the selected overload’s return type. Enhanced the comment on the mock to clarify that the spy is explicitly cast to the string[] overload of readdir.	test/s3-uploader.test.ts

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[sourcery-ai]

Hey there - I've reviewed your changes - here's some feedback:

• The custom typing on the jest.spyOn(fs.promises, 'readdir') spy narrows the signature to [path: fs.PathLike], which omits the optional options parameter used in some readdir overloads; consider reflecting the full function type (e.g., via jest.MockedFunction<typeof fs.promises.readdir>) so tests stay aligned with the real API surface.
• Instead of casting through unknown to jest.SpyInstance<Promise<string[]>, [fs.PathLike]>, consider defining a small typed helper or using a generic spyOn<typeof fs.promises.readdir> pattern to avoid brittle type assertions and make the intent clearer.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The custom typing on the `jest.spyOn(fs.promises, 'readdir')` spy narrows the signature to `[path: fs.PathLike]`, which omits the optional `options` parameter used in some `readdir` overloads; consider reflecting the full function type (e.g., via `jest.MockedFunction<typeof fs.promises.readdir>`) so tests stay aligned with the real API surface.
- Instead of casting through `unknown` to `jest.SpyInstance<Promise<string[]>, [fs.PathLike]>`, consider defining a small typed helper or using a generic `spyOn<typeof fs.promises.readdir>` pattern to avoid brittle type assertions and make the intent clearer.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@5f4460e). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #2   +/-   ##
=======================================
  Coverage        ?   92.21%           
=======================================
  Files           ?        4           
  Lines           ?      244           
  Branches        ?       64           
=======================================
  Hits            ?      225           
  Misses          ?       19           
  Partials        ?        0           

Flag	Coverage Δ
unittests	92.21% <ø> (?)

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[Copilot]

Pull request overview

This PR corrects the typing for the fs.promises.readdir mock in the S3 uploader tests to accurately reflect the actual implementation's behavior.

Key Changes:

• Updated the Jest spy typing to explicitly specify the string[] return type overload
• Removed the incorrect as unknown as fs.Dirent[] cast from the mock resolved value

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