FastRoleCheck.10.8

Corrects a settings write where DisableOnce was being set on the addon table instead of the Settings table (FastRoleCheck.Settings.DisableOnce). Adds a SafeUnitFlag helper (pcall wrapper) to safely call UnitIsAFK/UnitIsDND and uses it in the PLAYER_FLAGS_CHANGED handler to avoid runtime errors when unit flag APIs are unavailable or throw