Chat: update response

[lusmoura]

With the new version of the Cohere SDK, chat_history can contain tool results, which was breaking existing tests

AI Description

The PR introduces a new TOOL role for ChatRole in the Chat module. This change affects both the schema definition in chat.py and the generate_chat_response function in services/chat.py.

Files changed:

• src/backend/schemas/chat.py
• src/backend/services/chat.py

Code changes:

• Added a new TOOL role to the ChatRole StrEnum in chat.py.
• Modified the ChatMessage class in chat.py to include an optional tool_results field, which stores a list of tool call results.
• Updated the default value of the tool_results field in chat.py to an empty list.
• Refactored the generate_chat_response function in services/chat.py to handle the new tool_results field in the ChatMessage class.

Summary:
The PR introduces a new TOOL role for the ChatRole enumeration, enhancing the flexibility of the chat system by allowing messages to be associated with tools. This change is reflected in both the schema definition and the chat response generation logic. The tool_results field in the ChatMessage class provides a way to store and retrieve results from tool calls, improving the chat system's ability to handle tool-related interactions and responses.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

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  Partials        ?        0           

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