fix pair offline state

LightlessSync/PlayerData/Pairs/PairHandlerRegistry.cs

@@ -136,6 +136,7 @@ public sealed class PairHandlerRegistry : IDisposable
             if (TryFinalizeHandlerRemoval(handler))
             {
                 handler.Dispose();
+                _pairStateCache.Clear(registration.CharacterIdent);
             }
         }
         else if (shouldScheduleRemoval && handler is not null)
@@ -356,6 +357,7 @@ public sealed class PairHandlerRegistry : IDisposable
             finally
             {
                 _pairPerformanceMetricsCache.Clear(handler.Ident);
+                _pairStateCache.Clear(handler.Ident);
             }
         }
     }
@@ -377,6 +379,7 @@ public sealed class PairHandlerRegistry : IDisposable
         {
             handler.Dispose();
             _pairPerformanceMetricsCache.Clear(handler.Ident);
+            _pairStateCache.Clear(handler.Ident);
         }
     }
 
@@ -401,6 +404,7 @@ public sealed class PairHandlerRegistry : IDisposable
         if (TryFinalizeHandlerRemoval(handler))
         {
             handler.Dispose();
+            _pairStateCache.Clear(handler.Ident);
         }
     }