feat(middleware): add request id to response header in RequestIDMiddleware

[milaguyenlam]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @milaguyenlam, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new feature to the RequestIDMiddleware that enhances request traceability. Previously, the middleware would generate or retrieve a request ID and store it in the request context. With this change, the same request ID is now also added to the X-Request-ID HTTP response header, making it easier to track requests across distributed systems and for client-side debugging.

Highlights

• Response Header Inclusion: The RequestIDMiddleware now explicitly sets the X-Request-ID header in the HTTP response, ensuring that the unique request identifier is returned to the client.
• Documentation Update: The inline documentation for RequestIDMiddleware has been updated to accurately reflect its new behavior of saving the request ID to both the request context and the response header.

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.32%. Comparing base (f0cc04f) to head (14c7c02).

Files with missing lines	Patch %	Lines
http/middleware.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #43      +/-   ##
==========================================
- Coverage   66.55%   66.32%   -0.23%     
==========================================
  Files          12       12              
  Lines         586      588       +2     
==========================================
  Hits          390      390              
- Misses        185      187       +2     
  Partials       11       11              

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[gemini-code-assist]

Code Review

This pull request aims to add the request ID to the response headers in the RequestIDMiddleware. The change correctly updates the function's documentation and adds the necessary code to set the header. However, I've identified a logical flaw where the response header is not set if the request ID already exists in the context, causing the feature to be incomplete. My review includes a comment detailing this issue.