feat(loot): add LootService with deterministic independent rolls

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/api/src/loot/loot.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { RANDOM_SOURCE, systemRandomSource } from '../shared/random-source';
+import { LootTable } from './entities/loot-table.entity';
+import { LootTableEntry } from './entities/loot-table-entry.entity';
+import { LootService } from './loot.service';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([LootTable, LootTableEntry])],
+  providers: [LootService, { provide: RANDOM_SOURCE, useValue: systemRandomSource }],
+  exports: [LootService],
+})
+export class LootModule {}