feat: add visible pod discovery tools

crates/pod/tests/pod_comm_tools_test.rs

@@ -579,7 +579,7 @@ async fn restored_registry_uses_pod_state_without_runtime_file() {
 }
 
 #[tokio::test]
-async fn load_from_pod_state_prunes_children_with_missing_sockets() {
+async fn load_from_pod_state_prunes_runtime_children_but_preserves_durable_state() {
     let runtime_tmp = TempDir::new().unwrap();
     let store_tmp = TempDir::new().unwrap();
     let store = FsStore::new(store_tmp.path()).unwrap();
@@ -615,12 +615,23 @@ async fn load_from_pod_state_prunes_children_with_missing_sockets() {
         .read_by_name("spawner")
         .unwrap()
         .expect("spawner metadata should be written");
-    assert_eq!(metadata.spawned_children.len(), 1);
-    assert_eq!(metadata.spawned_children[0].pod_name, "alive");
+    assert_eq!(metadata.spawned_children.len(), 2);
+    assert!(
+        metadata
+            .spawned_children
+            .iter()
+            .any(|c| c.pod_name == "alive")
+    );
+    assert!(
+        metadata
+            .spawned_children
+            .iter()
+            .any(|c| c.pod_name == "missing")
+    );
 }
 
 #[tokio::test]
-async fn load_from_pod_state_reclaims_pruned_child_scope_and_registry_deny() {
+async fn load_from_pod_state_reclaims_pruned_child_scope_without_deleting_pod_state() {
     let _env = EnvGuard::acquire();
     let runtime_tmp = TempDir::new().unwrap();
     let store_tmp = TempDir::new().unwrap();
@@ -705,7 +716,8 @@ async fn load_from_pod_state_reclaims_pruned_child_scope_and_registry_deny() {
         .read_by_name("spawner")
         .unwrap()
         .expect("spawner metadata should remain");
-    assert!(metadata.spawned_children.is_empty());
+    assert_eq!(metadata.spawned_children.len(), 1);
+    assert_eq!(metadata.spawned_children[0].pod_name, "missing");
     let runtime_contents = std::fs::read_to_string(rd.path().join("spawned_pods.json")).unwrap();
     let runtime_records: Vec<SpawnedPodRecord> = serde_json::from_str(&runtime_contents).unwrap();
     assert!(runtime_records.is_empty());