Clean up orphaned non-global admins on the expire timer

CS2-SimpleAdmin/Database/IDatabaseProvider.cs

@@ -30,6 +30,7 @@ public interface IDatabaseProvider
     string GetAddGroupServerQuery();
     string GetDeleteGroupQuery();
     string GetDeleteOldAdminsQuery();
+    string GetDeleteOrphanedAdminsQuery();
     
     // BanManager
     string GetAddBanQuery();

CS2-SimpleAdmin/Database/MysqlDatabaseProvider.cs

@@ -188,6 +188,9 @@ public class MySqlDatabaseProvider(string connectionString) : IDatabaseProvider
     public string GetDeleteOldAdminsQuery() =>
         "DELETE FROM sa_admins WHERE ends IS NOT NULL AND ends <= @CurrentTime;";
 
+    public string GetDeleteOrphanedAdminsQuery() =>
+        "DELETE FROM sa_admins WHERE `global` = 0 AND id NOT IN (SELECT admin_id FROM sa_admins_servers);";
+    
     public string GetAddBanQuery()
     {
         return """

CS2-SimpleAdmin/Database/SqliteDatabaseProvider.cs

@@ -241,6 +241,9 @@ public class SqliteDatabaseProvider(string filePath) : IDatabaseProvider
     public string GetDeleteOldAdminsQuery() =>
         "DELETE FROM sa_admins WHERE ends IS NOT NULL AND ends <= @CurrentTime;";
 
+    public string GetDeleteOrphanedAdminsQuery() =>
+        "DELETE FROM sa_admins WHERE `global` = 0 AND id NOT IN (SELECT admin_id FROM sa_admins_servers);";
+    
     public string GetAddMuteQuery(bool includePlayerName) =>
         includePlayerName
             ? """

CS2-SimpleAdmin/Managers/PermissionManager.cs

@@ -677,4 +677,24 @@ public class PermissionManager(IDatabaseProvider? databaseProvider)
             CS2_SimpleAdmin._logger?.LogCritical("Unable to remove expired admins");
         }
     }
+
+    /// <summary>
+    /// Deletes orphaned admins that are not global and have no server assignments left.
+    /// </summary>
+    public async Task DeleteOrphanedAdmins()
+    {
+        if (databaseProvider == null) return;
+
+        try
+        {
+            await using var connection = await databaseProvider.CreateConnectionAsync();
+
+            var sql = databaseProvider.GetDeleteOrphanedAdminsQuery();
+            await connection.ExecuteAsync(sql);
+        }
+        catch (Exception)
+        {
+            CS2_SimpleAdmin._logger?.LogCritical("Unable to remove orphaned admins");
+        }
+    }
 }

CS2-SimpleAdmin/Managers/PlayerManager.cs

@@ -306,7 +306,8 @@ internal class PlayerManager
                         pluginInstance.MuteManager.ExpireOldMutes(),
                         pluginInstance.WarnManager.ExpireOldWarns(),
                         pluginInstance.CacheManager?.RefreshCacheAsync() ?? Task.CompletedTask,
-                        pluginInstance.PermissionManager.DeleteOldAdmins()
+                        pluginInstance.PermissionManager.DeleteOldAdmins(),
+                        pluginInstance.PermissionManager.DeleteOrphanedAdmins()
                     };
 
                     await Task.WhenAll(expireTasks);