Unification of the exposed health check data field format

[xstefank]

Description

In Zulip thread, it was proposed to unify the "data" field of the exposed health checks to enable easier machine parsing. We should look into all exposed health checks and, if possible, propose a unified API that we can expose.

Implementation ideas

No response

[quarkus-bot[bot]]

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[quarkus-bot[bot]]

/cc @jmartisk (health)

[xstefank]

I'll look into this.

[yrodiere]

@xstefank thanks, assigned to you then :)