HTTP code 400 when using Mistral AI as the provider

[ErwanLegrand]

Describe the bug
When a tool is used with a Mistral LLM, the following error is encountered:
Ran into this error: Request failed: Bad request (400): Unexpected role 'user' after role 'tool'.
This is a common error everyone encounters when implementing support for Mistral AI after OpenAI support is already implemented.
The fix is simple: there must be another request between the tool request and the next user request.

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To Reproduce
Steps to reproduce the behavior:

1. Configure Mistra AI as the provider
2. Start a goose session
3. Make the agent use a tool
4. Send another message to the agent

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Expected behavior
No HTTP error. Agent responds.

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Screenshots
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Please provide the following information

• OS & Arch: Debian AMD64
• Interface: CLI
• Version: [e.g. v1.0.2]
• Extensions enabled: [e.g. Computer Controller, Figma]
• Provider & Model: [e.g. Google – gemini-1.5-pro]

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Additional context
Add any other context about the problem here.