Refactor chat request handler to middleware-based architecture

[wachterjohannes]

• Extract adapter decision/execution logic into dedicated middleware
• Add ResponseFormatMiddleware for better separation of concerns
• Introduce static factory method for easier handler instantiation
• Make AIChatRequest metadata mutable via withMetadata() method
• Configure middleware priority order in Symfony integration
• Simplify AIChatRequestHandler constructor by removing DecisionTree dependency

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feature/middleware-architecture-refactoring

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}