PR Summary

Highlights Bedrock support and clarifies auth setup.

• Adds Amazon Bedrock to docs/providers/index.md
• Updates docs/bedrock.md to emphasize AWS credential chain (no apiKey), show optional AWS_BEARER_TOKEN_BEDROCK, and update the setup step wording
• Notes the change in CHANGELOG.md

^{Written by Cursor Bugbot for commit 3f44f41. This will update automatically on new commits. Configure here.}

Landed via temp rebase onto main.

• Gate: pnpm lint && pnpm build && pnpm test
• Land commit: 3f44f41
• Merge commit: aa7c291

Thanks @steipete!