feat(fifa17): own FUT hub tile counts in Rust

Migrate GET /hub from the Python proxy to a Rust handler deriving counts from
authoritative state: clubPlayers = owned PLAYER cards in Core (consumables/staff
excluded via catalog kind; may be lower than Python's profile count by the
deferred Legend instances = DIFFERENT-BY-DESIGN), auction/tradePile counts from
the durable market store via the async bridge. Fail-closed 503 on Core error;
market read failure degrades cosmetic counts to 0. Adds classify arm, handler,
ownership + integration tests; reachability tool marks hub migrated.

openfut-utas-host/tests/host_test.rs

@@ -1408,3 +1408,29 @@ fn non_economy_routes_rust_owned_no_python_no_core() {
         "no Python fallback for migrated non-economy routes"
     );
 }
+
+/// `GET /hub` is served from Rust: `clubPlayers` counts owned PLAYER cards in
+/// Core, auction/tradePile counts come from the durable market store (0 with no
+/// economy wired), and Python is never consulted.
+#[test]
+fn hub_counts_players_from_core_no_python() {
+    let items = vec![
+        item("oc1", "card_a", 84, "ST", "Brazil", "La Liga", "Barcelona"),
+        item("oc2", "card_b", 80, "CM", "Spain", "La Liga", "Real Madrid"),
+        item("oc3", "card_c", 77, "CB", "France", "Ligue 1", "PSG"),
+    ];
+    let core = Arc::new(FakeCore::new(items, 3));
+    let (py_url, rec) = spawn_mock_python();
+    let server = build_server(core, &py_url, None);
+
+    let resp = server.handle("GET", "/ut/game/fifa17/hub", &[], b"");
+    assert_eq!(resp.status, 200);
+    let body: Value = serde_json::from_slice(&resp.body).unwrap();
+    assert_eq!(body["clubPlayers"], 3, "counts owned player cards");
+    assert_eq!(body["auctionCount"], 0, "no economy wired => 0 listings");
+    assert_eq!(
+        body["tradePile"],
+        serde_json::json!({ "count": 0, "selling": 0, "sold": 0 })
+    );
+    assert_eq!(rec.lock().len(), 0, "hub never reaches Python");
+}