[Warlock] Apply Gloomhound and Isolated Implosion hotfixes

[millanzarreta]

This PR implements the latest Demonology Warlock changes found in the 12.1.0 PTR spell data (as of 2026-08-01) that require manual code adjustments.

Changes intended for 12.1.0 are guarded behind version checks. The existing behavior for versions <12.1.0 remains unchanged.

Gloomhound

The Summon Gloomhound effect was hotfixed to increase all of its damage by 35%.

There is no visible damage modifier or coefficient change in the spells or spell data used by Gloomhound. However, in-game testing on the 12.1.0 PTR confirmed that all of its damage is increased by 35%, including melee attacks, physical attacks, and spell attacks.

This damage increase has been modeled in SimC by increasing Gloomhound's owner-stat inheritance coefficients by 35% for versions >=12.1.0.

In spell data, the Summon Gloomhound spell changed its misc_value2 from 4266 to 6852. This value references a SummonProperties entry. Vilefiend and Charhound continue to use 4266, while the new 6852 value is exclusive to Gloomhound among these variants. The new SummonProperties entry 6852 is not yet available in the currently exported DB2 data, so its exact internal differences from 4266 cannot be inspected. This can be revisited once the entry becomes available, in case it provides any additional information about how this damage increase is applied to Gloomhound.

Isolated Implosion

The Demonology 12.1.0 4pc spell data effects used by Isolated Implosion were hotfixed:

Main target:       150% → 250%
Secondary targets: 125% → 225%

In-game damage remains unchanged. Before this hotfix, the listed 150%/125% values behaved as +150%/+125% increased effectiveness, resulting in total multipliers of 250%/225%. The corrected spell data now directly contains the observed total effectiveness values of 250%/225%. In SimC, the previous implementation base_dd_multiplier *= 1.0 + modifier; has therefore been changed to base_dd_multiplier *= modifier;