Is your feature request related to a problem? Please describe.
Demonology 11.1 tier 2-piece summons a Greater Dreadstalker either by random proc from spells, or casting Summon Demonic Tyrant. This new dreadstalker also refunds a Demonic Core when it despawns. So it is worth tracking, but currently not covered by TMW's guardian icon type.

Describe the solution you'd like
Add Greater Dreadstalker to the tracked guardian list.

Describe alternatives you've considered
Could check the Jackpot! buff instead, assuming applying/refreshing the buff equals 1 summon.

Additional context
Log with 2 instances of summoning, the first from random proc, and the second from summoning tyrant:
WoWCombatLog-012225_063514.txt

The spell that summons Greater Dreadstalker appears to be: https://www.wowhead.com/ptr-2/spell=1217615/call-greater-dreadstalker
I tried adding [237376] = Info(12, 1217615, false), -- Greater Dreadstalker to the guardian list. Seems working for the random procs, but when it is triggered by summoning tyrant, the TMW icon shows a duration of 30 seconds, instead of 12.

Btw, the Greater Dreadstalker's duration cannot be extended by tyrant in the current ptr build.