[feat] Add caching support for AWS Bedrock with Anthropic models #3251
Description
Product
BAML
Problem Statement / Use Case
Add support for AWS Bedrock's prompt caching in the aws-bedrock provider.
Caveat: aws-sdk-bedrockruntime is pinned to v1.106.0 where CachePointBlock only has a type field - ttl was added in v1.127.
Proposed Solution
Accept role metadata.
Alternative Solutions
No response
Additional Context
No response