feat: add deepseek r1 serverless

[NingLu]

Fixes #

🤖 AI-Generated PR Description (Powered by Amazon Bedrock)

Description

This pull request includes several changes to improve the integration of the LangChain library with our chat models. Specifically, the following modifications have been made:

1. source/lambda/shared/constant.py: Updated constants related to the chat models.
2. source/lambda/shared/langchain_integration/models/chat_models/bedrock_models.py: Refactored the implementation of the chat models to leverage the latest features of LangChain.
3. source/lambda/shared/langchain_integration/models/model_config.py: Adjusted the model configuration to accommodate the changes in the chat models.
4. source/lambda/shared/utils/prompt_utils.py: Improved the prompt utilities to enhance the user experience when interacting with the chat models.
5. source/portal/src/utils/const.ts: Updated the constants in the frontend to align with the changes in the backend.

These changes aim to enhance the performance and functionality of our chat models, providing a more seamless and efficient user experience. Additionally, the refactoring and integration with LangChain ensure better maintainability and extensibility of the codebase.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

File Stats Summary

File number involved in this PR: 5, unfold to see the details:

The file changes summary is as follows:

Files	Changes	Change Summary
source/lambda/shared/langchain_integration/models/chat_models/bedrock_models.py	1 added, 0 removed	The code change adds a new boolean attribute is_reasoning_model to the BedrockBaseModel class, which is set to False by default.
source/lambda/shared/constant.py	1 added, 0 removed	The code change adds a new constant BEDROCK_DEEPSEEK_R1 representing a model type to the LLMModelType class.
source/portal/src/utils/const.ts	9 added, 0 removed	The code adds a new model option called 'DeepSeek' with a single model variant 'deepseek.r1-v1:0' to the LLM_BOT_COMMON_MODEL_LIST array.
source/lambda/shared/langchain_integration/models/model_config.py	13 added, 1 removed	This code change adds a new configuration for the DeepSeek model, a reasoning model with specific settings, and includes it in the list of Bedrock model configurations.
source/lambda/shared/utils/prompt_utils.py	7 added, 0 removed	This code change adds a new LLM model type called 'BEDROCK_DEEPSEEK_R1' to several lists of supported model types.

[IcyKallen]

LGTM