refactor: resolve remaining field audit issues

apps/server/src/database/database-migrations.classroom-status.spec.ts

@@ -0,0 +1,36 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { getDataSourceToken } from '@nestjs/typeorm';
+import { DatabaseMigrationsService } from './database-migrations.service';
+
+describe('DatabaseMigrationsService — classroom status normalization', () => {
+  it('normalizes legacy persisted statuses to available', async () => {
+    const runner = {
+      connect: jest.fn(),
+      release: jest.fn(),
+      getTables: jest.fn().mockResolvedValue([{ name: 'classrooms' }]),
+      query: jest.fn().mockResolvedValue(undefined),
+    };
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        DatabaseMigrationsService,
+        {
+          provide: getDataSourceToken(),
+          useValue: {
+            options: { type: 'better-sqlite3' },
+            createQueryRunner: jest.fn().mockReturnValue(runner),
+          },
+        },
+      ],
+    }).compile();
+    const service = module.get(DatabaseMigrationsService) as DatabaseMigrationsService & {
+      normalizeClassroomStatuses(): Promise<void>;
+    };
+
+    await service.normalizeClassroomStatuses();
+
+    expect(runner.query).toHaveBeenCalledWith(
+      expect.stringContaining("status NOT IN ('available', 'maintenance', 'archived')"),
+    );
+    expect(runner.release).toHaveBeenCalled();
+  });
+});