v1.5.1

Fixed

• Thank You can recover a buff giver from the aura's caster GUID when the
  client supplies no usable unit token, including during delayed attribution
  retries. Use a matching unit or a readable player name without changing target.
• Keep group filtering tied to the recovered GUID, even when the caster's name
  is unavailable. Self and NPC casters never trigger the unknown-caster emote.
• Recovered directed emotes can use the captured player name if their unit
  disappears before sending. Missing or restricted identity data still follows
  the existing optional unknown-caster fallback and never invents a recipient.