Add support for OpenAI Developer message#3089

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andresssantos wants to merge 3 commits intospring-projects:mainfrom

andresssantos:chatclient-developer-message

Commits on May 10, 2025

feat: Add MessageType.DEVELOPER and support in message classes, models, and tests
andresssantos
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fix imports Neo4jChatMemoryRepositoryIT
andresssantos
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fix JdbcChatMemoryRepository to support developer message
andresssantos
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