chore: bump github.com/anthropics/anthropic-sdk-go from 1.18.0 to 1.19.0 (#21013)

Bumps
[github.com/anthropics/anthropic-sdk-go](https://github.com/anthropics/anthropic-sdk-go)
from 1.18.0 to 1.19.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/anthropics/anthropic-sdk-go/releases">github.com/anthropics/anthropic-sdk-go's
releases</a>.</em></p>
<blockquote>
<h2>v1.19.0</h2>
<h2>1.19.0 (2025-11-24)</h2>
<p>Full Changelog: <a
href="https://github.com/anthropics/anthropic-sdk-go/compare/v1.18.1...v1.19.0">v1.18.1...v1.19.0</a></p>
<h3>Features</h3>
<ul>
<li><strong>api:</strong> adds support for Claude Opus 4.5, Effort,
Advance Tool Use Features, Autocompaction, and Computer Use v5 (<a
href="https://github.com/anthropics/anthropic-sdk-go/commit/a03391cb00b8c78c79fd8bfe447f00d78f37db25">a03391c</a>)</li>
</ul>
<h2>v1.18.1</h2>
<h2>1.18.1 (2025-11-19)</h2>
<p>Full Changelog: <a
href="https://github.com/anthropics/anthropic-sdk-go/compare/v1.18.0...v1.18.1">v1.18.0...v1.18.1</a></p>
<h3>Bug Fixes</h3>
<ul>
<li><strong>structured outputs:</strong> use correct beta header (<a
href="https://github.com/anthropics/anthropic-sdk-go/commit/09ec0a647b1a108bb7c74e4c7b1016502ca781bb">09ec0a6</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/anthropics/anthropic-sdk-go/blob/main/CHANGELOG.md">github.com/anthropics/anthropic-sdk-go's
changelog</a>.</em></p>
<blockquote>
<h2>1.19.0 (2025-11-24)</h2>
<p>Full Changelog: <a
href="https://github.com/anthropics/anthropic-sdk-go/compare/v1.18.1...v1.19.0">v1.18.1...v1.19.0</a></p>
<h3>Features</h3>
<ul>
<li><strong>api:</strong> adds support for Claude Opus 4.5, Effort,
Advance Tool Use Features, Autocompaction, and Computer Use v5 (<a
href="https://github.com/anthropics/anthropic-sdk-go/commit/a03391cb00b8c78c79fd8bfe447f00d78f37db25">a03391c</a>)</li>
</ul>
<h2>1.18.1 (2025-11-19)</h2>
<p>Full Changelog: <a
href="https://github.com/anthropics/anthropic-sdk-go/compare/v1.18.0...v1.18.1">v1.18.0...v1.18.1</a></p>
<h3>Bug Fixes</h3>
<ul>
<li><strong>structured outputs:</strong> use correct beta header (<a
href="https://github.com/anthropics/anthropic-sdk-go/commit/09ec0a647b1a108bb7c74e4c7b1016502ca781bb">09ec0a6</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/anthropics/anthropic-sdk-go/commit/0e4a219d952e839fbbfe42e54282e44c1c28f1fb"><code>0e4a219</code></a>
release: 1.19.0</li>
<li><a
href="https://github.com/anthropics/anthropic-sdk-go/commit/9ea2999a49dac535ab07ff6a94aaf70f4ec3b85a"><code>9ea2999</code></a>
feat(api): adds support for Claude Opus 4.5, Effort, Advance Tool Use
Feature...</li>
<li><a
href="https://github.com/anthropics/anthropic-sdk-go/commit/9d1fca29394cf4a2aff51e99b4b089882cf0b769"><code>9d1fca2</code></a>
release: 1.18.1</li>
<li><a
href="https://github.com/anthropics/anthropic-sdk-go/commit/f79df507220e2a46ca26e00562fd0300de1fe99f"><code>f79df50</code></a>
fix(structured outputs): use correct beta header</li>
<li><a
href="https://github.com/anthropics/anthropic-sdk-go/commit/9c3ce43f8b134b0f74449bf258f5a6828f80f59d"><code>9c3ce43</code></a>
codegen metadata</li>
<li>See full diff in <a
href="https://github.com/anthropics/anthropic-sdk-go/compare/v1.18.0...v1.19.0">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=github.com/anthropics/anthropic-sdk-go&package-manager=go_modules&previous-version=1.18.0&new-version=1.19.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after
your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating
it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)


</details>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -473,7 +473,7 @@ require (
 )
 
 require (
-	github.com/anthropics/anthropic-sdk-go v1.18.0
+	github.com/anthropics/anthropic-sdk-go v1.19.0
 	github.com/brianvoe/gofakeit/v7 v7.9.0
 	github.com/coder/agentapi-sdk-go v0.0.0-20250505131810-560d1d88d225
 	github.com/coder/aibridge v0.2.0

go.sum

@@ -726,8 +726,8 @@ github.com/andybalholm/brotli v1.2.0 h1:ukwgCxwYrmACq68yiUqwIWnGY0cTPox/M94sVwTo
 github.com/andybalholm/brotli v1.2.0/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
 github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
 github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
-github.com/anthropics/anthropic-sdk-go v1.18.0 h1:jfxRA7AqZoCm83nHO/OVQp8xuwjUKtBziEdMbfmofHU=
-github.com/anthropics/anthropic-sdk-go v1.18.0/go.mod h1:WTz31rIUHUHqai2UslPpw5CwXrQP3geYBioRV4WOLvE=
+github.com/anthropics/anthropic-sdk-go v1.19.0 h1:mO6E+ffSzLRvR/YUH9KJC0uGw0uV8GjISIuzem//3KE=
+github.com/anthropics/anthropic-sdk-go v1.19.0/go.mod h1:WTz31rIUHUHqai2UslPpw5CwXrQP3geYBioRV4WOLvE=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/apache/arrow/go/v10 v10.0.1/go.mod h1:YvhnlEePVnBS4+0z3fhPfUy7W1Ikj0Ih0vcRo/gZ1M0=
 github.com/apache/arrow/go/v11 v11.0.0/go.mod h1:Eg5OsL5H+e299f7u5ssuXsuHQVEGC4xei5aX110hRiI=