feat(models): expose speed tiers in v1 metadata

[KakatkarAkshay]

Superseded

This PR has been absorbed into #887 so model catalog compatibility lands in one reviewable branch.

#887 now includes this PR's /v1/models speed-tier metadata support. The folded commits preserve @KakatkarAkshay's authorship and contributor credit.

Relationship:

• Superseded by fix(models): hide unsupported API models #887.
• Do not merge this PR separately.
• No issue closure moved because this PR did not claim one.

[Soju06]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 6ee5ecd8f6

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[Soju06]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. You're on a roll.

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[Komzpa]

Closing as absorbed by #887.

#887 now carries this PR's speed-tier metadata support while preserving @KakatkarAkshay's authorship and contributor credit.