Chore/pass accept language on requests

[renatoalmeidav]

What is the purpose of this pull request?

Pass Accept-Language header through the catalog-api-proxy middleware to enable locale-aware catalog responses.

What problem is this solving?

The Catalog API supports returning translated Category fields (name, titleTag, metaTagDescription) based on the Accept-Language header. However, the
catalog-api-proxy was not forwarding this header, preventing the GraphQL layer from receiving pre-translated values.
This change is required for the following companion PRs:

• [CATS-4817] Remove @translatableV2 from Category fields search-graphql#172 - Remove @translatableV2 from Category fields
• [CATS-4817] Return Category fields from catalog without Messages wrapping search-resolver#608 - Stop wrapping Category fields with formatTranslatableProp
  With this proxy change, Category fields will be returned already translated from the Catalog API, eliminating double translation in the GraphQL layer.

How should this be manually tested?

1. Deploy this PR along with the companion PRs
2. Query product { categoryTree { name titleTag metaTagDescription } } on a localized binding
3. Verify that Category fields are returned in the correct locale based on the request's Accept-Language header
4. Confirm no Messages encoding or double translation occurs

Screenshots or example usage

N/A

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Requires change to documentation, which has been updated accordingly.

[vtex-io-ci-cd]

Hi! I'm VTEX IO CI/CD Bot and I'll be helping you to publish your app! 🤖

Please select which version do you want to release:

• Patch (backwards-compatible bug fixes)

• Minor (backwards-compatible functionality)

• Major (incompatible API changes)

And then you just need to merge your PR when you are ready! There is no need to create a release commit/tag.

• No thanks, I would rather do it manually 😞

[vtex-io-docs-bot]

Beep boop 🤖

I noticed you didn't make any changes at the docs/ folder

• There's nothing new to document 🤔
• I'll do it later 😞

In order to keep track, I'll create an issue if you decide now is not a good time

• I just updated 🎉🎉