Make external codec boundaries explicit and exhaustive

crates/lazaret-runtime-supervisor/src/supervision.rs

@@ -44,6 +44,14 @@ const MAX_RUNTIME_HANDOFF_BYTES: usize = 64 * 1024;
 const READINESS_TIMEOUT: Duration = Duration::from_secs(30);
 const TERMINATION_GRACE: Duration = Duration::from_secs(2);
 
+pub const RUNTIME_SUPERVISOR_SERIALIZED_RECORD_TYPE_NAMES: &[&str] = &[
+    "RuntimeSupervisorHandoff",
+    "NetworkProbeRequest",
+    "AttachedRunscSignal",
+    "SupervisorEvent",
+    "CoordinatorMessage",
+];
+
 #[derive(Clone, Copy, Debug, Deserialize, Eq, PartialEq, Serialize)]
 pub enum AttachedRunscSignal {
     Stop,