Release: Merge develop into main

[TUT888]

Summary

This PR promotes the latest stable work from develop into main.
It includes multiple feature branches that have already been reviewed and merged into develop.

Supported Features

1. User Authentication

For detailed information, please refer to the feature/auth branches its PRs

• Register, login, logout, and refresh tokens
• JWT-based secure authentication
• Secure access to user profile information

2. AI-Powered Quiz Generation

For detailed information, please refer to the feature/ai-quiz-generation branch and its PRs

• Generate quizzes from notes using HuggingFace models
• Sample endpoint for testing without authentication

3. Other CRUD Management Features

For detailed information, please refer to the feature/XXX-basic-crud branches and their PRs

Document Management (CRUD): All types of documents including notes, flashcards, and quizzes

• List all documents by user, or delete specific document

Note Management:

• Create, update, retrieve, and delete notes

Flashcard & Flashcard Sets Management:

• Create, update, retrieve, and delete flashcards
• Organize flashcards into sets

Quiz & Quiz Sets Management:

• Create, update, retrieve, and delete quizzes
• Organize quizzes into sets
• Track quiz attempts and scores

Testing and CI/CD

For detailed information, please refer to PR #13

Tests can be run manually and automatically on PR created

• Unit tests for NoteService (business logic with mocked dependencies)
• Integration tests for DocumentRepository (using in‑memory H2 database by default)
• Integration tests for NoteController (using MySQL and Redis containers via Testcontainers)

[TUT888]

Proceeding with merge as the collaborator is temporarily unavailable.