clientmod: fix anti-cheat diagnostics for 2020.12.18

The cheat/boot diagnostics were written against the older build's names
and never bound on 2020.12.18, so the OnUpdate retry loop re-logged
[patch-miss] every ~5s for the full 60s window and never completed.

- repoint the cheat hooks at CheatManager.On{Time,ObscuredType,Height,
  AdvancedMovement}CheatDetected (the four that exist here), verified in
  CheatManager.txt
- drop the nonexistent DeveloperFlag/StreamingAsset cheat hooks and the
  BootSequence.RegisterError hook (no such method on this build) plus its
  now-dead BootSequenceRegisterError_Prefix helper

Diagnostics now all resolve on the first pass, so the retry loop ends
and the [patch-miss] spam stops.

DorkNet.ClientMod/Mod.cs

@@ -638,21 +638,24 @@ public class Mod : MelonMod
     private bool RegisterGameDiagnostics(bool logMisses)
     {
         var complete = true;
-        complete &= TryPatchDiagnosticByName("BootSequence", "RegisterError", new[] { typeof(string) },
-                                            prefix: nameof(DiagnosticPatches.BootSequenceRegisterError_Prefix),
-                                            logMiss: logMisses);
 
+        // CheatManager fires these when its anti-cheat heuristics trip —
+        // logging them surfaces "client thinks it's been tampered with",
+        // a common cause of silent dorm-drops / kicks on a modded client.
+        // Names verified in CheatManager.txt for 2020.12.18; the older
+        // build's "AnalyticsHelper.<X>Cheat" names don't exist here, and
+        // there's no DeveloperFlag/StreamingAsset callback nor a
+        // BootSequence.RegisterError sink in this build — those legacy
+        // hooks were removed (they only ever logged [patch-miss] forever).
         foreach (var method in new[]
         {
-            "UnityTimeCheat",
-            "ObscuredTypeCheat",
-            "DeveloperFlagCheat",
-            "HeightChangeCheat",
-            "AdvancedMotionCheat",
-            "StreamingAssetCheat"
+            "OnTimeCheatDetected",
+            "OnObscuredTypeCheatDetected",
+            "OnHeightCheatDetected",
+            "OnAdvancedMovementCheatDetected",
         })
         {
-            complete &= TryPatchDiagnosticByName("AnalyticsHelper", method,
+            complete &= TryPatchDiagnosticByName("CheatManager", method,
                                                  prefix: nameof(DiagnosticPatches.AnalyticsCheat_Prefix),
                                                  logMiss: logMisses);
         }
@@ -1375,12 +1378,6 @@ internal static class DiagnosticPatches
         WriteStack();
     }
 
-    public static void BootSequenceRegisterError_Prefix(string error)
-    {
-        Write($"[boot-error] BootSequence.RegisterError: {error}");
-        WriteStack();
-    }
-
     public static void AnalyticsCheat_Prefix(MethodBase __originalMethod)
     {
         Write($"[cheat-analytics] {__originalMethod.DeclaringType?.FullName}.{__originalMethod.Name}");