Introduce IThreatStateStore with first-hit acquire on damaging casts
and deterministic leash clears on player move and pre-acquire checks.
Co-authored-by: Cursor <cursoragent@cursor.com>
Replace alpha/beta dummies with PrototypeNpcRegistry (melee/ranged/elite),
per-archetype max HP from INpcBehaviorDefinitionRegistry, and updated
server tests + Bruno smokes. Documents breaking client change for NEO-97.
Co-authored-by: Cursor <cursoragent@cursor.com>
Add dev combat-targets fixture reset endpoint, Bruno pre-request helper, and enable fixture in CI Bruno step so combat-targets tests run after ability-cast defeat spine.