feat: with monitoring

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

crates/churn-domain/Cargo.toml

@@ -14,4 +14,5 @@ clap.workspace = true
 dotenv.workspace = true
 axum.workspace = true
 reqwest.workspace = true
-serde.workspace = true
+serde.workspace = true
+uuid.workspace = true

crates/churn-domain/src/lib.rs

@@ -20,6 +20,6 @@ pub struct ServerEnrollReq {
 
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct ServerMonitorResp {
-    pub cursor: String,
+    pub cursor: Option<uuid::Uuid>,
     pub logs: Vec<String>,
 }