3.4.15.dev4: Nightly Development Release

What's Changed

Enhancements ➕➕

• Update deployment concurrency limit lease maintenance to raise on failure by @desertaxle in #18811

Bug Fixes 🐞

• Fix metric trigger validation in automations schema by @zzstoatzz in #18773

Documentation 📓

• Fix Docker healthcheck documentation to use Python instead of curl by @zzstoatzz in #18809
• Fix event filter empty label value arrays to return no results by @chrisguidry in #18810

Full Changelog: 3.4.15.dev3...3.4.15.dev4