influxdb-spring 7.4.0 is not compatible with Spring Boot 4.x (Actuator package changes)

まだ誰も着手していません。

### Description

The latest `influxdb-spring` version **7.4.0** is currently **not compatible with Spring Boot 4.x**.

Spring Boot 4 introduced breaking changes in Actuator packages.
Some classes were moved from:

org.springframework.boot.actuate.*

to:

org.springframework.boot.health.*

As a result, `influxdb-spring` 7.4.0 fails to compile or run when used together with Spring Boot 4.

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### Affected versions

- influxdb-spring: **7.4.0**
- Spring Boot: **4.x**

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### Root cause

Spring Boot 4 refactored Actuator-related packages, for example:

org.springframework.boot.actuate.health.*

➡️

org.springframework.boot.health.*

`influxdb-spring` still references the old Actuator packages, which no longer exist in Spring Boot 4.

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### Expected behavior

`influxdb-spring` should be able to work with Spring Boot 4, or at least:
- Provide conditional support for both Boot 3.x and Boot 4.x
- Or clearly document that Spring Boot 4 is not supported yet

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### Proposed solution

I can provide a patch that updates the affected imports and adapts the code to Spring Boot 4's new package structure.

If you are open to it, I’m happy to:
- Submit a PR
- Or discuss the best compatibility strategy (multi-release, conditional class loading, etc.)

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### Additional context

Spring Boot 4 introduces several breaking changes, and this is one of the blockers when upgrading existing projects that rely on `influxdb-spring`.

Please let me know how you’d like to proceed.

この issue では、influxdb-spring にある古い org.springframework.boot.actuate.* 参照と、Spring Boot 4 における対応する org.springframework.boot.health.* パッケージを特定しています。まず、それらの参照を見つけ、Spring Boot 3.x および 4.x の依存関係がどのように扱われているかを確認してください。合意された互換性の方針が実装されるか、Spring Boot 4 のサポートに関する制限が明確に文書化されれば完了です。

索引モデルが issue の本文から書いたものです。