[FEATURE] Support Mistral v2 SDK

[mkmeral]

Problem Statement

Mistral released v2 of their client. We should update to support latest client

https://github.com/mistralai/client-python/blob/main/MIGRATION.md

Proposed Solution

No response

Use Case

Mistral model provider users who want to use latest versions (for support, features, etc)

Alternatives Solutions

No response

Additional Context

No response

[mkmeral]

For the issue, there aren't really new "features" to add as use cases. v2.0 is a breaking change release focused on:

• Cleaner namespace packaging (PEP 420)
• Consistent type naming conventions
• Forward compatibility for enums/unions

No new API endpoints, no new capabilities. It's a developer experience improvement on the SDK side.