[AWS DynamoDB] Support consistent vs eventual-consistent read

Support metadata indicating whether the read is consistent and eventual-consistent.

My recommendation is for default to be consistent read.

Start by locating the AWS DynamoDB component and reading its read entry point to understand how read options are currently passed. Determine how consistency metadata should be represented and confirm whether the default should be consistent, then verify the behavior with the component's existing tests or add coverage if the repository provides it.

Written by the indexing model from the issue text.