fetcher/state: Extend test for same RID, different nodes

The extension of the test shows that Node B's fetch cannot be dequeued because
the RID is in the active fetch set.

It can then be dequeued once Node A has been fetched from.

crates/radicle-protocol/src/fetcher/test/state/command/fetch.rs

@@ -101,6 +101,17 @@ fn fetch_same_repo_different_nodes_queues_second() {
     let active = state.get_active_fetch(&repo_1);
     assert!(active.is_some());
     assert_eq!(*active.unwrap().from(), node_a);
+
+    // Cannot dequeue for node_b since the repo is active
+    assert!(state.dequeue(&node_b).is_none());
+
+    // Clearing the orphaned entry (as a fix, or a restart, would) unblocks it.
+    state.fetched(command::Fetched {
+        from: node_a,
+        rid: repo_1,
+    });
+    let dequeued = state.dequeue(&node_b).expect("repo is fetchable again");
+    assert_eq!(dequeued.rid, repo_1);
 }
 
 #[test]