XP: Attribute Core

- Optimized the pet attribute system (PetAttributeEvents + OwnedCompanionTracker) to resolve and cache pet owners once, removing per-tick reflection and expensive lookups. - BloodRageEffect, TimeRuptureEffect, and their handlers now use a generic per-player CooldownManager, avoiding any work when the abilities are inactive. - FrostWalkerEffect was rewritten to freeze less frequently, use packed block positions and lighter block-update flags, keeping its cost very low even with many players active. - EchoImpactEffect was refactored to apply extra damage with an internal cooldown and a secondary explosive hit guarded against recursion, coordinated via a cleaner ImpactUtilManager. These changes significantly reduced AttributeCore’s server cost: from about 3.50% of the server thread down to roughly 0.14% in the latest profile.