AI Implementation feature(910): Scoreboard: Ranking, Matrix, Event Log and Score Graph 1.00 (#53)

docs/api/challenges.md

@@ -3,7 +3,7 @@ type: api
 title: Challenges Endpoints
 description: Authenticated challenge board, single-challenge detail, flag submission, event-state snapshot, and the combined authenticated SSE stream that pushes status + solve frames.
 tags: [api, challenges, board, score, scoreboard, sse, submit]
-timestamp: 2026-07-23T05:10:00Z
+timestamp: 2026-07-23T05:41:00Z
 ---
 
 # Endpoints
@@ -181,7 +181,7 @@ sources and emits `MessageEvent` frames whose `type` is one of:
 | `event:` | Payload                                                                                         |
 |----------|-------------------------------------------------------------------------------------------------|
 | `status` | `{ state, server_time_utc, event_start_utc, event_end_utc, seconds_to_start, seconds_to_end }` |
-| `solve`  | `{ challenge_id, player_id, player_name, awarded_points, rank_bonus, awarded_at_utc, position, live_points, solve_count, initial_points, minimum_points, decay_solves }` |
+| `solve`  | `{ challenge_id, challenge_name, category_abbreviation, player_id, player_name, awarded_points, rank_bonus, awarded_at_utc, position, live_points, solve_count, initial_points, minimum_points, decay_solves }` |
 
 Sources:
 
@@ -203,8 +203,13 @@ appended as-is.
 `backend/src/modules/challenges/dto/challenges.dto.ts`). The
 controller maps both camelCase and snake_case aliases so a
 downstream consumer can read either shape (for example
-`challenge_id` or `challengeId`, `player_id` or `userId`,
-`awarded_points` or `pointsAwarded`).
+`challenge_id` or `challengeId`, `challenge_name` or `challengeName`,
+`category_abbreviation` or `categoryAbbreviation`, `player_id` or
+`userId`, `awarded_points` or `pointsAwarded`). `challenge_name`
+and `category_abbreviation` carry the same display metadata that
+the `/api/v1/scoreboard/event-log` projection joins in, so the
+Scoreboard Event Log tab can render a freshly pushed row without
+performing a second lookup.
 
 # Scoreboard endpoints