Changes
PR #1845 by ksylvan: Add Claude Opus 4.5 Support
- Add Claude Opus 4.5 model variants to Anthropic client
- Upgrade anthropic-sdk-go from v1.16.0 to v1.19.0
- Update golang.org/x/crypto from v0.41.0 to v0.45.0
- Upgrade golang.org/x/net from v0.43.0 to v0.47.0
- Bump golang.org/x/text from v0.28.0 to v0.31.0