3.7.1.dev8: Nightly Development Release

What's Changed

Bug Fixes 🐞

• Fix concurrency lease renewal starvation with thread-backed renewal by @desertaxle in #21925

Uncategorized

• Ensure ECS observer ack waits for handlers by @desertaxle in #21927
• docs(events): note metric-trigger Cloud gating and event prefix difference by @zzstoatzz in #21935
• Add cancelling_timeout_teardown.v1 cleanup handler by @desertaxle in #21911

Full Changelog: 3.7.1.dev7...3.7.1.dev8