fix(battle-node): node_server_url matches prod wire format (no scheme, with path)

Prod do_matching captures (data_dumps/captures/traffic_prod_tk2_*) send
the node URL as host:port/socket.io/ with no scheme prefix —
e.g. "node06.shadowverse.jp:13560/socket.io/". BestHTTP's SocketManager
expects this exact shape; the leading ws:// we were sending plus the
missing /socket.io/ path was preventing the client from completing the
post-do_matching connect (eventually times out with "connection timed
out").

Update BattleNodeOptions default, Program.cs override, and both
controller and bridge tests to use "localhost:5148/socket.io/".

Discovered during v1 smoke walkthrough.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.BattleNode/Bridge/BattleNodeOptions.cs

@@ -1,10 +1,11 @@
 namespace SVSim.BattleNode.Bridge;
 
 /// <summary>
-/// DI-injected options for the battle node. The web host populates these — typically
+/// DI-injected options for the battle node. NodeServerUrl matches the prod
-/// nodeServerUrl is "ws://localhost:5148" matching ASPNETCORE_URLS.
+/// do_matching wire format: <c>host:port/socket.io/</c>, no scheme prefix.
+/// BestHTTP's SocketManager parses it as the Socket.IO v2 endpoint URL.
 /// </summary>
 public sealed class BattleNodeOptions
 {
-    public string NodeServerUrl { get; set; } = "ws://localhost:5148";
+    public string NodeServerUrl { get; set; } = "localhost:5148/socket.io/";
 }

SVSim.EmulatedEntrypoint/Program.cs

@@ -119,8 +119,9 @@ public class Program
 
         builder.Services.AddBattleNode(opt =>
         {
-            // ASPNETCORE_URLS defaults to http://localhost:5148; we map ws:// onto the same host:port.
+            // Matches the prod do_matching wire format: host:port/socket.io/, no scheme prefix.
-            opt.NodeServerUrl = "ws://localhost:5148";
+            // BestHTTP's SocketManager parses this as the Socket.IO v2 endpoint URL.
+            opt.NodeServerUrl = "localhost:5148/socket.io/";
         });
 
         builder.Services.AddTransient<ShadowverseTranslationMiddleware>();

SVSim.UnitTests/BattleNode/Bridge/MatchingBridgeTests.cs

@@ -11,11 +11,11 @@ public class MatchingBridgeTests
     public void RegisterPendingBattle_RegistersInStoreAndReturnsNodeUrl()
     {
         var store = new InMemoryBattleSessionStore();
-        var bridge = new MatchingBridge(store, new BattleNodeOptions { NodeServerUrl = "ws://localhost:5148" });
+        var bridge = new MatchingBridge(store, new BattleNodeOptions { NodeServerUrl = "localhost:5148/socket.io/" });
 
         var match = bridge.RegisterPendingBattle(viewerId: 906243102);
 
-        Assert.That(match.NodeServerUrl, Is.EqualTo("ws://localhost:5148"));
+        Assert.That(match.NodeServerUrl, Is.EqualTo("localhost:5148/socket.io/"));
         Assert.That(match.BattleId, Is.Not.Empty);
         var pending = store.TryGetPending(match.BattleId);
         Assert.That(pending, Is.Not.Null);

SVSim.UnitTests/Controllers/ArenaTwoPickBattleControllerTests.cs

@@ -28,7 +28,10 @@ public class ArenaTwoPickBattleControllerTests
         var battleId = root.GetProperty("battle_id").GetString();
         Assert.That(battleId, Is.Not.Null.And.Not.Empty);
         var nodeUrl = root.GetProperty("node_server_url").GetString();
-        Assert.That(nodeUrl, Does.StartWith("ws://"));
+        // Matches prod wire format: host:port/socket.io/, no scheme prefix.
+        Assert.That(nodeUrl, Does.Contain("/socket.io/"));
+        Assert.That(nodeUrl, Does.Not.StartWith("ws://"));
+        Assert.That(nodeUrl, Does.Not.StartWith("http://"));
         // Required when matching_state ∈ {3004,3007,3011} per
         // DoMatchingBase.SettingCardMasterId; client throws KeyNotFoundException without it.
         Assert.That(root.GetProperty("card_master_id").GetInt32(), Is.EqualTo(1));