feat(combat): add combat domain enums, entities, and encounter consumption field

apps/api/src/database/migrations/combat-system.migration.spec.ts

@@ -0,0 +1,65 @@
+import 'reflect-metadata';
+import { getMetadataArgsStorage } from 'typeorm';
+import { Combat } from '../../combat/entities/combat.entity';
+import { CombatEvent } from '../../combat/entities/combat-event.entity';
+import { HuntEncounter } from '../../hunting/entities/hunt-encounter.entity';
+
+describe('combat system schema', () => {
+  it('maps Combat and CombatEvent relations with the documented onDelete behavior', () => {
+    const metadata = getMetadataArgsStorage();
+
+    const relations = metadata.relations.filter(
+      (relation) => relation.target === Combat || relation.target === CombatEvent,
+    );
+
+    expect(
+      relations.map((relation) => ({
+        onDelete: relation.options.onDelete,
+        propertyName: relation.propertyName,
+        target: relation.target,
+      })),
+    ).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'character', target: Combat }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'huntEncounter', target: Combat }),
+        expect.objectContaining({ onDelete: 'RESTRICT', propertyName: 'monster', target: Combat }),
+        expect.objectContaining({ onDelete: 'CASCADE', propertyName: 'combat', target: CombatEvent }),
+      ]),
+    );
+  });
+
+  it('enforces one combat per hunt encounter via a unique index', () => {
+    const metadata = getMetadataArgsStorage();
+    const index = metadata.indices.find(
+      (candidate) => candidate.target === Combat && candidate.columns?.includes('huntEncounterId'),
+    );
+
+    expect(index).toBeDefined();
+    const indexMetadata = index as typeof index & { options?: { unique?: boolean }; unique?: boolean };
+    expect(indexMetadata?.options?.unique ?? indexMetadata?.unique).toBe(true);
+  });
+
+  it('enforces ordered, unique event sequencing per combat', () => {
+    const metadata = getMetadataArgsStorage();
+    const index = metadata.indices.find(
+      (candidate) =>
+        candidate.target === CombatEvent &&
+        candidate.columns?.includes('combatId') &&
+        candidate.columns?.includes('sequence'),
+    );
+
+    expect(index).toBeDefined();
+    const indexMetadata = index as typeof index & { options?: { unique?: boolean }; unique?: boolean };
+    expect(indexMetadata?.options?.unique ?? indexMetadata?.unique).toBe(true);
+  });
+
+  it('adds a nullable consumedAt column to hunt_encounters to prevent reuse', () => {
+    const metadata = getMetadataArgsStorage();
+    const column = metadata.columns.find(
+      (candidate) => candidate.target === HuntEncounter && candidate.propertyName === 'consumedAt',
+    );
+
+    expect(column).toBeDefined();
+    expect(column?.options.nullable).toBe(true);
+  });
+});