chore: change to byte slice

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn-domain/src/lib.rs

@@ -47,3 +47,9 @@ impl LogEvent {
 pub struct Agent {
     pub name: String,
 }
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct Lease {
+    pub id: uuid::Uuid,
+    pub lease: uuid::Uuid,
+}