Refactor: move auth and quota middleware into dedicated middleware di…

[Suhani370]

Summary

This PR moves auth.py and quota.py into a dedicated middleware directory under src/llama_stack/core/server to improve project structure and make middleware components easier to identify.

Changes

• Created a new middleware/ directory
• Moved:
  • auth.py
  • quota.py

Notes

As discussed in the issue, auth_providers.py was intentionally left in its current location since it defines provider interfaces rather than acting as middleware.
Please let me know if any adjustments are needed. Happy to update!

[meta-cla]

Hi @Suhani370!

Thank you for your pull request and welcome to our community.

Action Required

In order to merge any pull request (code, docs, etc.), we require contributors to sign our Contributor License Agreement, and we don't seem to have one on file for you.

Process

In order for us to review and merge your suggested changes, please sign at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need to sign the corporate CLA.

Once the CLA is signed, our tooling will perform checks and validations. Afterwards, the pull request will be tagged with CLA signed. The tagging process may take up to 1 hour after signing. Please give it that time before contacting us about it.

If you have received this in error or have any questions, please contact us at cla@meta.com. Thanks!

[mergify]

This pull request has merge conflicts that must be resolved before it can be merged. @Suhani370 please rebase it. https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

[meta-cla]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Meta Open Source project. Thanks!