Implement the 009-combatant-hp feature that adds optional max HP and current HP tracking per combatant with +/- controls, direct entry, and persistence

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/domain/src/index.ts

@@ -1,4 +1,5 @@
 export { type AddCombatantSuccess, addCombatant } from "./add-combatant.js";
+export { type AdjustHpSuccess, adjustHp } from "./adjust-hp.js";
 export { advanceTurn } from "./advance-turn.js";
 export {
 	type EditCombatantSuccess,
@@ -8,8 +9,10 @@ export type {
 	CombatantAdded,
 	CombatantRemoved,
 	CombatantUpdated,
+	CurrentHpAdjusted,
 	DomainEvent,
 	InitiativeSet,
+	MaxHpSet,
 	RoundAdvanced,
 	TurnAdvanced,
 } from "./events.js";
@@ -17,6 +20,7 @@ export {
 	type RemoveCombatantSuccess,
 	removeCombatant,
 } from "./remove-combatant.js";
+export { type SetHpSuccess, setHp } from "./set-hp.js";
 export {
 	type SetInitiativeSuccess,
 	setInitiative,