refactor(workspace): enforce layered crate boundaries

crates/aether-testing/testkit/src/tracing.rs

@@ -0,0 +1,14 @@
+use aether_runtime::{init_service_runtime, ServiceRuntimeConfig};
+
+pub fn init_test_runtime() {
+    init_test_runtime_for("aether-testkit");
+}
+
+pub fn test_runtime_config(service_name: &'static str) -> ServiceRuntimeConfig {
+    ServiceRuntimeConfig::new(service_name, "aether_testkit=debug")
+        .with_metrics_namespace("aether_testkit")
+}
+
+pub fn init_test_runtime_for(service_name: &'static str) {
+    let _ = init_service_runtime(test_runtime_config(service_name));
+}