[BUG]Advanced document analysis does not allow chunk text to be retrieved correctly

## 🚨 **Please Note** 🚨

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## 🐞Describe the bug

When using advanced document parsing (sonet3.5), I cannot get chunked text correctly

## 🔄 To Reproduce

1. Prepare a knowledge base that uses advanced document analysis (sonet3.5)
2. Create a bot that links the knowledge base from 1.
3. Talk to the bot

## 📷 Screenshots

## 🔎 Logs for Chat Issues

If the issue occurs during a chat interaction, please check the following logs on Amazon Cloudwatch Logs and include the relevant entries in your issue:

- `/aws/lambda/BedrockChatStack-BackendApiHandlerXXXX`
- `/aws/lambda/BedrockChatStack-WebSocketHandlerXXXX`

## 🔎 Logs for Bot Creation/Update Issues

If the issue occurs during bot creation or updating, please check the execution records of the AWS Step Functions state machine named `EmbeddingStateMachineXXX` and include the details in your issue.

## 📝 Additional context

When the content is IAMGE, the text seems to be stored in x-amz-bedrock-kb-description, but I think this is not being taken into consideration.


Could you please take the following into consideration?

Start with the AWS CloudWatch logs for BedrockChatStack-BackendApiHandlerXXXX and BedrockChatStack-WebSocketHandlerXXXX, then inspect the EmbeddingStateMachineXXX execution records for a knowledge base using advanced document analysis. Compare the retrieved chunks with the text stored in x-amz-bedrock-kb-description for image content; done means chunk text is retrieved correctly in the bot conversation.

Written by the indexing model from the issue text.