[Fix] Clear GuildOnlineStatus on world boot (#4306)

Ensure that the guild member online status is set to offline (0) when world boots.

common/database.cpp

@@ -2089,3 +2089,8 @@ void Database::PurgeCharacterParcels()
 		RuleI(Parcel, ParcelPruneDelay)
 	);
 }
+
+void Database::ClearGuildOnlineStatus()
+{
+	GuildMembersRepository::ClearOnlineStatus(*this);
+}

common/database.h

@@ -243,6 +243,7 @@ public:
 	void SetRaidGroupLeaderInfo(uint32 group_id, uint32 raid_id);
 
 	void PurgeAllDeletedDataBuckets();
+	void ClearGuildOnlineStatus();
 
 
 	/* Database Variables */

common/repositories/guild_members_repository.h

@@ -190,6 +190,17 @@ public:
 
 		return UpdateOne(db, m);
 	}
+
+	static void ClearOnlineStatus(Database &db)
+	{
+		auto results = db.QueryDatabase(
+			fmt::format(
+				"UPDATE {} SET `online` = 0 "
+				"WHERE `online` = 1;",
+				TableName()
+			)
+		);
+	}
 };
 
 #endif //EQEMU_GUILD_MEMBERS_REPOSITORY_H