feat: migrate checks to NestJS

[apalchys]

Pull Request Guidelines

Issue:
N/A

Description:
Migrating routes from server/ to nestjs/

Self-Check:

• Database migration added (if required)
• Changes tested locally

[Copilot]

Pull Request Overview

This PR migrates check-related routes from the legacy server/ directory to the NestJS framework. The migration adds new API endpoints for retrieving bad comment checkers and max score checkers, updates the OpenAPI specification, and refactors the client-side code to use the new API.

Key changes:

• Added new NestJS endpoints for course task check validations (bad comments and max score checkers)
• Migrated client services from legacy axios to generated API client
• Updated TypeScript and typescript-eslint versions

Reviewed Changes

Copilot reviewed 19 out of 20 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
package.json	Updates TypeScript tooling to newer versions
nestjs/src/spec.json	Adds OpenAPI specifications for new check endpoints and CourseAggregateStatsDto
nestjs/src/courses/task-verifications/task-verifications.service.ts	Improves type safety by moving type assertion to filter result
nestjs/src/courses/stats/dto/course-stats.dto.ts	Adds explicit type annotation for courseTasks array property
nestjs/src/courses/stats/course-stats.controller.ts	Adds API query decorators and fixes ParseArrayPipe type parameter
nestjs/src/courses/courses.module.ts	Registers new CourseTaskChecksService provider
nestjs/src/courses/course-tasks/index.ts	Exports new CourseTaskChecksService
nestjs/src/courses/course-tasks/dto/max-score-checker.dto.ts	Defines DTO for max score checker data
nestjs/src/courses/course-tasks/dto/index.ts	Exports new DTOs
nestjs/src/courses/course-tasks/dto/bad-comment-checker.dto.ts	Defines DTO for bad comment checker data
nestjs/src/courses/course-tasks/course-tasks.controller.ts	Adds new endpoints for retrieving check validation data
nestjs/src/courses/course-tasks/course-task-checks.service.ts	Implements business logic for check validations
client/src/services/check.ts	Simplifies service to use generated API client
client/src/modules/CrossCheckPairs/components/BadReview/BadReviewTable.tsx	Updates to use new DTO types and removes unused column
client/src/modules/CrossCheckPairs/components/BadReview/BadReviewControllers.tsx	Refactors to use hooks-based API calls
client/src/modules/CourseStatistics/hooks/useCourseStats.tsx	Updates to use CourseAggregateStatsDto type
client/src/modules/CourseStatistics/components/StatCards/StatCards.tsx	Updates to use CourseAggregateStatsDto type
client/src/api/index.ts	Adds eslint-disable comment
client/src/api/api.ts	Adds new DTOs and updates API method signatures (generated code)

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[Copilot]

The items property should be set to Number (the constructor), not Array<number> (the type). This will cause a runtime error as ParseArrayPipe expects a constructor function to parse each item.

Suggested change

	@Query('ids', new ParseArrayPipe({ items: Array<number>, optional: true })) ids: number[],
	@Query('ids', new ParseArrayPipe({ items: Number, optional: true })) ids: number[],