## Summary
- Update all @ai-sdk/* packages to latest versions
- Update core ai package from ^6.0.14 to ^6.0.68
- Remove unused openai dependency

## Test plan
- [x] Lint checks pass (formatting and linting)
- [x] All 661 unit tests pass
- [ ] Manual testing of AI provider integrations

🤖 Generated with [Claude Code](https://claude.com/claude-code)
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<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Updated the ai package and all @ai-sdk/* providers to the latest
versions to pick up recent fixes and features. Removed the unused openai
client to reduce install size and avoid overlapping APIs.

- **Dependencies**
  - ai → ^6.0.68
- Updated @ai-sdk packages: amazon-bedrock ^4.0.46, anthropic ^3.0.35,
azure ^3.0.26, google ^3.0.20, google-vertex ^4.0.41, mcp ^1.0.18,
openai ^3.0.25, openai-compatible ^2.0.26, provider-utils ^4.0.13, xai
^3.0.46
  - Removed openai

- **Migration**
  - Run install to update lockfile.
  - No code changes expected; verify provider integrations in staging.

<sup>Written for commit 4959fe16eaff0234e477422d4d8a54f47ef8f23f.
Summary will update on new commits.</sup>

<!-- End of auto-generated description by cubic. -->
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>