fix(vertx): deploy verticles with async decorated blocking handlers

[andrewazores]

Fixes #929

• tmp: add intentionally blocking API handler for testing
• fix(vertx): deploy verticles with async decorated blocking handlers

The first commit in this series is just for testing purposes. It adds an API handler at "/api/beta/block" that sleeps the current thread for 5 seconds, then returns a "hello" string response.

This can be used to test by doing:

https :8181/api/beta/block

in one terminal. In a second terminal, before that first request completes,

https :8181/health

In current main, the /health request will not return until after the /block request returns. After the fix in this PR is applied these requests are properly handled concurrently again.

[ebaron]

Works as described for me. With just the block handler, the health check is blocked. With the fix, the health check doesn't block.

[jan-law]

Works well for me

[andrewazores]

Just replaced S.o.println with logger.info and removed the BlockingHandler manual testing API endpoint. No other changes on that force push.

[hareetd]

Web-client is working well too with the changes.