[Snyk] Fix for 1 vulnerabilities

[ayusuf-mq]

Snyk has created this PR to fix 1 vulnerabilities in the maven dependencies of this project.

Snyk changed the following file(s):

• samples/client/petstore/java/vertx/pom.xml

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score	Upgrade
	HTTP Request Smuggling SNYK-JAVA-IOVERTX-14988768	545	io.vertx:vertx-rx-java: 3.4.2 -> 4.5.24 io.vertx:vertx-web-client: 3.4.2 -> 4.5.24 Major version upgrade No Path Found No Known Exploit

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[ayusuf-mq]

This major version upgrade from Vert.x 3.x to 4.x introduces significant breaking changes, primarily around asynchronous programming patterns and a mandatory upgrade from RxJava 1 to a newer version (RxJava 3 is supported).

Highlights:

• io.vertx:vertx-rx-java: This upgrade is a major breaking change. Vert.x 3 used RxJava 1. Vert.x 4 introduces support for RxJava 3, which has a completely different set of classes, package names (io.vertx.rxjava3), and operator semantics. Code must be rewritten to use the new RxJava 3 APIs.
• io.vertx:vertx-web-client: The core asynchronous pattern has shifted from callbacks to Futures. While callbacks are still available for easier migration, many methods now return a Future<T>, changing how asynchronous operations are composed and handled.

Source: Vert.x documentation
Recommendation: A staged migration is required. First, update code to use the new Future-based APIs and then rewrite all vertx-rx-java integrations to comply with the RxJava 3 APIs before merging.

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