feat: wire HuntingController/HuntingModule and enrich current-location with monster pool

Registers HuntingModule (POST /api/hunts) into the DI graph alongside its
new entities, and adds possibleMonsters (enabled LocationMonster pool,
weight-descending, empty when hunting is disabled) to
WorldService.getCurrentLocation. Also updates the pre-existing
DB-less app.e2e-spec.ts to override HuntingModule the same way the other
feature modules already are, since it now needs a real DataSource.

apps/api/src/hunting/hunting.controller.spec.ts

@@ -0,0 +1,50 @@
+import { INestApplication } from '@nestjs/common';
+import { Test } from '@nestjs/testing';
+import request from 'supertest';
+import { App } from 'supertest/types';
+import { configureApplication } from '../app.config';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { HuntingController } from './hunting.controller';
+import { HuntingService } from './hunting.service';
+
+describe('HuntingController', () => {
+  let app: INestApplication<App>;
+  const startHunt = jest.fn();
+
+  beforeEach(async () => {
+    startHunt.mockReset();
+    const module = await Test.createTestingModule({
+      controllers: [HuntingController],
+      providers: [
+        {
+          provide: HuntingService,
+          useValue: { startHunt },
+        },
+      ],
+    }).compile();
+
+    app = module.createNestApplication<App>();
+    configureApplication(app);
+    await app.init();
+  });
+
+  afterEach(async () => {
+    await app.close();
+  });
+
+  it('delegates to huntingService.startHunt with the demo character id and returns its result', async () => {
+    const huntResult = {
+      id: 'hunt-1',
+      location: { id: 'loc-1', key: 'burned-road', name: 'Verbrannte Strasse' },
+      encounters: [],
+    };
+    startHunt.mockResolvedValue(huntResult);
+
+    const response = await request(app.getHttpServer())
+      .post('/api/hunts')
+      .expect(201);
+
+    expect(startHunt).toHaveBeenCalledWith(DEMO_CHARACTER_ID);
+    expect(response.body).toEqual(huntResult);
+  });
+});