Current affairs models

Folder: models/current-affairs/

File	Baby description
`daily-issue.model.ts`	One day’s CA bundle (metadata + structure)
`current-affair-item.model.ts`	Single news item / article entry
`current-affair-flashcard.model.ts`	Short recall card
`current-affair-mcq.model.ts`	Multiple-choice question
`current-affair-related-pyq.model.ts`	Link news topic to PYQ bank
`nexus-entity.model.ts`	Editorial “entity” graph node
`user-ca-news-bookmark.model.ts`	User saved an article
`user-ca-news-revision.model.ts`	Scheduled revision for bookmarked news
`user-revision-item.model.ts`	Generic revision queue item

Public routes read published content; admin routes mutate drafts.