Vamooses Companions

FIXED:
- Portrait: Fixed crash in raids, M+, and PvP from Midnight secret boolean
  values. APIs like IsFlying, IsMounted, and UnitIsAFK return opaque values
  in protected contexts that crash on boolean test. Portrait now detects
  secret contexts and degrades to combat animation. Belt-and-suspenders
  pcall wrapper catches any cases the context guard misses.
- Collectors: Fixed UnitIsAFK boolean test leaking secret value outside pcall.
  The test is now inside the pcall closure so the error is caught properly.
- Collectors: Fixed UnitName potentially returning a secret string in instanced
  combat, causing string.find to crash on the loot message filter.