v0.52.51

## Changelog
### Other stuff
* 70b3703c144f534b60522ce8967699c024124770: chore(copilot): add new models: claude-opus-5.5, gpt-6-sol and gpt-6-luna (@andreynering)
* a45afcc3b5749b645e6e13517da84c782d6d17de: chore(coralbricks): deepseek v4.1 flash takes attachments (@divyvasal)
* 8ff68cd93e7e4f325e5c97a4fc2700440bef823d: chore(coralbricks): drop gpt-oss-120b, retired by the provider (@divyvasal)
* f90575b09aceb83807d0e3a93f227996e9b911f0: chore(coralbricks): publish cache-write rates for every model (@divyvasal)
* dd51c21b2e84b4a6aabb382f1f9f9a4cce31b9ae: chore(coralbricks): update deepseek v4.1 flash pricing (@divyvasal)
* bbb8163c56deab3ec4cbdfe9040a44a1d1bdde99: chore: add new models: claude-opus-5.5, gpt-6-sol and gpt-6-luna (#618) (@andreynering)
* 3397165561fe7d40fea0feeb31b464c5e5005b6f: chore: auto-update generated files (#619) (@github-actions[bot])

---

<details>
<summary>Verifying the artifacts</summary>

First, download the [`checksums.txt` file](https://github.com/charmbracelet/catwalk/releases/download/v0.52.51/checksums.txt) and the [`checksums.txt.sigstore.json` file](https://github.com/charmbracelet/catwalk/releases/download/v0.52.51/checksums.txt.sigstore.json) files, for example, with `wget`:

```bash
wget 'https://github.com/charmbracelet/catwalk/releases/download/v0.52.51/checksums.txt'
wget 'https://github.com/charmbracelet/catwalk/releases/download/v0.52.51/checksums.txt.sigstore.json'
```

Then, verify it using [`cosign`](https://github.com/sigstore/cosign):

```bash
cosign verify-blob \
  --certificate-identity 'https://github.com/charmbracelet/meta/.github/workflows/goreleaser.yml@refs/heads/main' \
  --certificate-oidc-issuer 'https://token.actions.githubusercontent.com' \
  --bundle 'checksums.txt.sigstore.json' \
  ./checksums.txt
```

If the output is `Verified OK`, you can safely use it to verify the checksums of other artifacts you downloaded from the release using `sha256sum`:

```bash
sha256sum --ignore-missing -c checksums.txt
```

Done! You artifacts are now verified!

</details>

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