[Feature] Create QuestComment class model for quest comments (1:1 to quest)

[karastoyanov]

✨ Feature Description

Design and implement a new SQLAlchemy model, QuestComment, for managing comments related to individual coding quests. This model should enforce a 1-to-1 relationship with the coding_quests table and track the author, comment text, and creation time.

🧩 Problem Statement

Currently, there is no comment-tracking feature connected to quests. Adding the QuestComment model enables feedback, notes, or additional info for each coding quest.

💡 Proposed Solution

• Create a new QuestComment model/class.
• Include a 1:1 relationship with the existing coding_quests model (using quest_id as foreign key, ensuring each quest has at most one comment record).
• Fields:
  • id: Primary key, UUID or integer
  • quest_id: Foreign key to coding_quests, enforce uniqueness
  • comment_author: UserId of the author's comment (string, required): Relation with users table 1-to-1
  • comment: Text of the comment (required)
  • created_at: Date/time of creation (default current timestamp)

📋 Acceptance Criteria

• QuestComment model exists with all specified fields
• Enforces 1:1 relationship with coding_quests
• Enforces 1:1 relationship with users