fix: work on laya 0.3.2 too (PyPI index had not propagated 0.3.3)

laya_routing.py

@@ -77,7 +77,12 @@ def attach_existing(agent):
     if router is None or agent is None:
         return False
     try:
-        router.attach("english", agent)
+        if hasattr(router, "attach"):          # laya >= 0.3.3
+            router.attach("english", agent)
+        else:                                  # 0.3.2: same effect, private path
+            router._agents["english"] = agent
+            router._touch("english")
+            router.max_loaded = max(router.max_loaded, len(router._agents))
         print("routing: reusing the already-built english checkpoint", flush=True)
         return True
     except Exception as e: