build(deps): bump anthropic from 0.116.0 to 1.9.0

Bumps [anthropic](https://github.com/anthropics/anthropic-sdk-python) from 0.116.0 to 1.9.0.
- [Release notes](https://github.com/anthropics/anthropic-sdk-python/releases)
- [Changelog](https://github.com/anthropics/anthropic-sdk-python/blob/main/CHANGELOG.md)
- [Commits](https://github.com/anthropics/anthropic-sdk-python/compare/v0.116.0...v1.9.0)

---
updated-dependencies:
- dependency-name: anthropic
  dependency-version: 1.9.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,4 +1,4 @@
-anthropic==0.116.0
+anthropic==1.9.0
 google-genai==2.10.0
 openai==2.44.0
 pre-commit==4.6.0