Fix MistralAiApi to handle thinking content blocks#5020

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KyleKreuter wants to merge 3 commits intospring-projects:mainfrom

KyleKreuter:GH-5019

Commits on Dec 3, 2025

Fix MistralAiApi to handle thinking content blocks
KyleKreuter
committed

Commits on Dec 4, 2025

Add MistralAiAssistantMessage and Magistral thinking support
KyleKreuter
committed
Update tests to use MAGISTRAL_SMALL model instead of MAGISTRAL_MEDIUM
KyleKreuter
committed