Current affairs services

`current-affairs.service.ts`

Main entry: load daily issues, items, publish workflow hooks.

`current-affairs-ancillary.service.ts`

Supporting operations (related PYQ, search helpers, editorial utilities).

Bookmark & revision

File	Role
`current-affairs-bookmark.service.ts`	Save/remove bookmarks
`current-affairs-revision.service.ts`	Build revision due lists
`current-affairs-bookmark-news-revision.service.ts`	News-specific revision
`current-affairs-bookmark-news-revision.scheduler.ts`	Compute next review dates

Uses utils: current-affairs-search-expand.ts, ca-local-datetime.ts, nexus-entity-status.ts.

Search backend selectors

Folder: services/current-affairs-search/

Tiny helpers that decide which MongoDB feature backs full-text and vector queries. They never run queries themselves — the calling service reads the flag and picks the code path.

File	Returns	Driven by env
`text-search-backend.ts`	`currentAffairsTextSearchBackend()` → `'regex' \| 'atlas'`	`MONGO_ATLAS_SEARCH_ENABLED` (truthy → `atlas`, default `regex`)
`text-search-backend.ts`	`currentAffairsSearchWindowDays()` → `number`	`CA_SEARCH_WINDOW_DAYS` (default `60`)
`vector-search-backend.ts`	`currentAffairsVectorSearchBackend()` → `'in_app' \| 'atlas'`	`MONGO_ATLAS_VECTOR_SEARCH_ENABLED` (truthy → `atlas`, default `in_app`)
`vector-search-backend.ts`	`currentEmbeddingModel()` → `string`	`EMBEDDING_MODEL` (default `'default'`)
`vector-search-backend.ts`	`currentEmbeddingVersion()` → `number`	`EMBEDDING_VERSION` (default `1`)

Production (Atlas + vector search enabled) flips both flags to true. Local dev runs the regex + in_app paths so no Atlas-only features are required.