build: bump minor dependencies and harden JESpace timing tests

[ar-agt]

Summary

• bump jansi from 2.4.2 to 2.4.3
• bump micrometer-core and micrometer-prometheus from 1.16.1 to 1.16.4
• bump jackson from 2.21.1 to 2.21.2
• harden JESpaceTestCase expiration timing so it stays stable on slower hosts

Notes

While validating the dependency bumps, JESpaceTestCase.testPushExpire() failed on this machine. I reproduced the same failure on plain latest main, so this was a pre-existing timing-sensitive test rather than a bump regression.

Testing

• ./gradlew test