chore: bump version to 0.10.0

v0.10.0 ships DNS-over-TLS. Tagged release v0.10.0 on main after
merge will pick up this Cargo.toml version, keeping tag and manifest
aligned for release.yml.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -1143,7 +1143,7 @@ dependencies = [
 
 [[package]]
 name = "numa"
-version = "0.9.1"
+version = "0.10.0"
 dependencies = [
  "arc-swap",
  "axum",