refactor(workspace): enforce layered crate boundaries

crates/aether-ai/serving/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "aether-ai-serving"
+version = "0.1.0"
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+description = "AI serving application contracts and ports for Aether"
+
+[dependencies]
+aether-ai-formats.workspace = true
+aether-contracts.workspace = true
+aether-data-contracts.workspace = true
+aether-pool-core.workspace = true
+aether-scheduler-core.workspace = true
+async-trait.workspace = true
+http.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+url.workspace = true
+
+[dev-dependencies]
+tokio.workspace = true