Add support for guardrails tags in ChatBedrockConverse

[madmed88]

Checked

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Feature request

To use Bedrock guardrails effectively with Converse API, you need to tag specific parts of the prompt with guardContent and qualifiers:

https://docs.aws.amazon.com/bedrock/latest/userguide/guardrails-use-converse-api.html#guardrails-use-converse-api-call-message

https://docs.aws.amazon.com/bedrock/latest/userguide/guardrails-contextual-grounding-check.html#guardrails-contextual-grounding-converse-api

The current ChatBedrockConverse does not seem to support this.

Motivation

Lack of appropriate support for Bedrock guardrails in ChatBedrockConverse

Proposal (If applicable)

No response

[madmed88]

It looks like there is support for guardContent in the python version but not for qualifiers https://github.com/langchain-ai/langchain-aws/blob/89ea067b5605cf732684e49f9e23f8bb19bd1335/libs/aws/langchain_aws/chat_models/bedrock_converse.py#L791