feat(mistral-ai): update model YAMLs [bot]

[hganwani-droid]

Auto-generated by poc-agent for provider mistral-ai.

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Note

Low Risk
Low risk metadata-only changes to provider model configuration (capabilities, modalities, costs, and limits) with no runtime logic changes; primary risk is misconfigured model capabilities/params causing request validation or API errors.

Overview
Updates Mistral model YAMLs to reflect current capabilities and metadata.

Adds costs, structured_output, explicit mode, and modalities (including new audio/pdf inputs for mistral-small-2603), adjusts context_window values, and adds source documentation links. Introduces voxtral-mini-tts-260213 as text_to_speech with audio output and a removeParams list to strip unsupported generation parameters.

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