Discover page: refresh, harvest admin and seed reasons; docs (BL-0051)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/architecture.md

@@ -210,7 +210,7 @@ All requests and responses are JSON. POSTs require `Content-Type: application/js
 | `GET /api/discovery` | user | The caller's discovery feed, settings, feedback and `refresh: { state: idle\|queued\|running, position?, nextAllowedAt?, blockedReason? }` (§6.6) |
 | `POST /api/discovery/feedback` `{candidateId, value}` | user | The caller's choice for a candidate; requires opt-in |
 | `POST /api/discovery/refresh` | user | Queue a per-user AniList harvest for the caller (opt-in required, else `403`). `{ harvestId, position }`; `409` while one is queued or running for the caller; `429 { nextAllowedAt }` within an hour of the last accepted refresh; `503 { blockedReason }` after AniList pushed back, until a nightly or admin harvest |
-| `GET /api/admin/discovery` | admin | Last scoring run, opted-in users, candidate count, plus `harvest` (last run record), `currentHarvest`, `cache: { files, bytes }`, `settings: { harvestEnabled, harvestAt }` and `nextNightlyAt` (`null` when off) |
+| `GET /api/admin/discovery` | admin | Last scoring run, `lastError` (a failed admin run or a failed re-score after a harvest), opted-in users, candidate count, plus `harvest` (last run record), `currentHarvest`, `cache: { files, bytes }`, `settings: { harvestEnabled, harvestAt }` and `nextNightlyAt` (`null` when off) |
 | `POST /api/admin/discovery/run` | admin | Re-score every user from local data; `409` while a run is active |
 | `POST /api/admin/discovery/harvest` | admin | Start a full harvest for all opted-in users: `{ harvestId, position }`, `409` while any harvest is queued or running |
 | `POST /api/admin/discovery/settings` `{harvestEnabled, harvestAt}` | admin | Exactly a boolean and an `HH:MM` time, anything else is `400`; stored in `discovery.json` `settings` |