feat: complete PRD verification fixes and deployment readiness

- Add CommonModule to provide/export CampusScope across business modules
- Replace DepartmentsModule imports with CommonModule in 11 modules
- Add missing Class/Tenant repository imports to StudentsModule and SchedulesModule
- Fix service specs with CampusScope, ClassRepository, StudentRepository mocks
- Move better-sqlite3 to optionalDependencies for production Docker builds
- Rewrite Dockerfiles for monorepo root build context
- Update docker-compose.yml service build contexts

apps/server/src/attendance/attendance.module.ts

@@ -4,12 +4,12 @@ import { AttendanceRecord, DingAttendanceRaw, Student, Class } from '../entities
 import { AttendanceService } from './attendance.service';
 import { AttendanceController } from './attendance.controller';
 import { OperationLogsModule } from '../operation-logs/operation-logs.module';
-import { DepartmentsModule } from '../departments/departments.module';
+import { CommonModule } from '../common/common.module';
 @Module({
   imports: [
     TypeOrmModule.forFeature([AttendanceRecord, DingAttendanceRaw, Student, Class]),
     OperationLogsModule,
-    DepartmentsModule,
+    CommonModule,
   ],
   controllers: [AttendanceController],
   providers: [AttendanceService],