Suppress DUID mismatch check resulting in create account hang (#3)

* test duuid mismatch failures

* add variables to trigger or suppress DUID mismatch

* update docs

* turn on by default

Patches/DUIDProbePatch.cs

@@ -0,0 +1,58 @@
+using System.Collections.Generic;
+using HarmonyLib;
+using UnityEngine;
+
+namespace RecNetPlugin.Patches;
+
+// Diagnostic only. Two jobs:
+//   1. Show where the stored device id lives, by logging PlayerPrefs reads/writes.
+//   2. Show how far the DUID migration branch gets, by logging CheatManager's other DUID methods.
+//      If WriteDUIDs() never fires after the deviceId POST, the flow stalls before it.
+[HarmonyPatch]
+public static class DUIDProbePatch
+{
+    // PlayerPrefs.GetString is called constantly, so log each key only once — except device/DUID
+    // keys, which we always log so we can watch them change across the migration.
+    private static readonly HashSet<string> SeenKeys = new();
+
+    private static bool IsInteresting(string key) =>
+        key != null && (key.Contains("DUID") || key.Contains("Duid") || key.Contains("duid")
+                     || key.Contains("Device") || key.Contains("device")
+                     || key.Contains("Anon") || key.Contains("anon"));
+
+    private static void Note(string op, string key, string value)
+    {
+        if (IsInteresting(key))
+            Plugin.Log.LogWarning($"[DUID-PROBE] {op} {key} = \"{value}\"");
+        else if (SeenKeys.Add($"{op}:{key}"))
+            Plugin.Log.LogInfo($"[DUID-PROBE] {op} {key} = \"{value}\"");
+    }
+
+    [HarmonyPostfix]
+    [HarmonyPatch(typeof(PlayerPrefs), nameof(PlayerPrefs.GetString), [typeof(string)])]
+    private static void GetStringPostfix(string key, string __result) => Note("get", key, __result);
+
+    [HarmonyPostfix]
+    [HarmonyPatch(typeof(PlayerPrefs), nameof(PlayerPrefs.GetString), [typeof(string), typeof(string)])]
+    private static void GetStringDefaultPostfix(string key, string __result) => Note("get", key, __result);
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(PlayerPrefs), nameof(PlayerPrefs.SetString))]
+    private static void SetStringPrefix(string key, string value) => Note("SET", key, value);
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(PlayerPrefs), nameof(PlayerPrefs.DeleteKey))]
+    private static void DeleteKeyPrefix(string key) => Note("DEL", key, "<deleted>");
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(CheatManager), "WriteDUIDs")]
+    private static void WriteDUIDsPrefix() => Plugin.Log.LogWarning("[DUID-PROBE] WriteDUIDs() called");
+
+    [HarmonyPostfix]
+    [HarmonyPatch(typeof(CheatManager), "WriteDUIDs")]
+    private static void WriteDUIDsPostfix() => Plugin.Log.LogWarning("[DUID-PROBE] WriteDUIDs() returned");
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(CheatManager), "ClearDUIDs")]
+    private static void ClearDUIDsPrefix() => Plugin.Log.LogWarning("[DUID-PROBE] ClearDUIDs() called");
+}