Record phase 3 importer and fetch full player history

The importer needs every day of /history for the triangle's monthly points;
the API returns only 50 by default.

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

docs/plan.md

@@ -543,6 +543,54 @@ loads, and `GET /player/76561199407393962` returns 404 rather than 500.
 
 ### Phase 3: Importer
 
+**Importer done 2026-11-09** (`pleb/main` at `737575b`, not pushed yet). Usage
+and the full file → table mapping are in the fork's `MIRROR.md`. A full import
+takes about 11 s, and an unchanged rerun writes 0 rows. What differs from the
+steps below:
+
+- The archived responses are deserialized straight into the entity types,
+  because their property names match. Only scalar columns are copied onto the
+  tracked rows; keys, foreign keys and navigations are set explicitly. Leaderboard
+  snapshots are the main source for `Song`/`DifficultyDescription`. A score's
+  embedded leaderboard is a fallback only, and no score needed it.
+- One-to-one children (`ScoreImprovement`, `ReplayOffsets`, `ModifiersRating`,
+  `DifficultyStatistics`, `ModifiersMap`, stats, settings) get local ids, so
+  they can't collide with upstream ids. Scores, difficulties, songs,
+  leaderboards, mappers and history rows keep upstream ids.
+- `PlayerScoreStatsHistory` lives in **`StorageContext`**, so that database
+  isn't empty. The exporter had saved only 50 days of `/history` (the API
+  default); it now asks for `count=100000` (1,138 days for pleb). The triangle
+  needs those monthly points.
+- No legacy `Player` row. An `AccountLink` (`PCOculusID` = legacy id) plus a
+  `// pleb:` patch in `PlayerIdToMain` resolves `/player/76561197962107242`
+  to pleb. Upstream only checks Steam-range ids against Oculus links. The
+  legacy account's 3 BL scores are skipped until phase 5.
+- `StoragePath/replays` is a symlink to the archive's `beatleader/replays`.
+  Score stats are copied to `StoragePath/scorestats/<scoreId>.json`.
+- Clans aren't mirrored (`ClanOrder` is blank).
+
+Imported: 2,552 songs, 10,104 difficulties, 10,098 leaderboards, 628 mappers,
+3,565 scores, 3,568 score stats, 1,138 history rows. API check against the
+archived upstream responses, on a scratch DB with `ASPNETCORE_ENVIRONMENT=Mirror`:
+
+- `/player/{id}?stats=true` matches. The only differences are row ids,
+  clans, and `linkedIds`, which now lists the alt.
+- `/player/{id}/scores?includeIO=true`: 3,565 total. Scores, improvements and
+  offsets match, and unranked difficulties now carry stars and the skill
+  triangle ratings.
+- `/accgraph` and `/history/triangle` match. `/score/statistic/{id}` redirects
+  to the local file.
+- **Open: `/leaderboard/{id}` and `/leaderboard/scores/{id}` return 500.**
+  `LeaderboardController.GeneralScores` projects
+  `Player.Clans.OrderBy(…ClanOrder…).Take(1)`, which needs SQL `APPLY`, and
+  SQLite has none. The same pattern appears about 8 times, in
+  `ScoreController`, `ReplayController`, `LeaderboardController` and
+  `ClanUtils`. Fix it in a separate server commit before phase 4. For example,
+  skip the clan projection in MirrorMode (there are no clans), or move the
+  ordering client-side.
+
+The check below (stock website) is still to do in phase 4.
+
 `Tools/ArchiveImporter` lives in the fork, references the main project, and
 uses its `AppContext`/`StorageContext`. Run it as a one-shot that is idempotent
 and upserts by upstream id.
@@ -563,7 +611,7 @@ and upserts by upstream id.
   an `AccountLink` or alt pointing to the main player, so `PlayerIdToMain`
   resolves `/u/76561197962107242` to `pleb`. Its 3 BL scores go through the
   phase 5 merge like any other candidate.
-- `StorageContext` (attempts) stays empty, because attempts aren't exported.
+- `StorageContext` holds `PlayerScoreStatsHistory`; its attempts tables stay empty, because attempts aren't exported.
 - `scorestats/*.json` → the `scorestats` storage container, using the filename
   the server expects (check `ScoreController.GetStatistic`).
 

scripts/archive/beatleader.ts

@@ -26,7 +26,9 @@ export async function exportProfile(playerId: string): Promise<void> {
 	const dir = (kind: string) => bl('players', playerId, kind);
 	const endpoints: [string, string][] = [
 		['profile', `/player/${playerId}?stats=true`],
-		['history', `/player/${playerId}/history`],
+		// count: days of history; the default is 50, which loses the triangle's
+		// monthly points. Upstream keeps one row per day since the first score.
+		['history', `/player/${playerId}/history?count=100000`],
 		['triangle', `/player/${playerId}/history/triangle`],
 		['accgraph', `/player/${playerId}/accgraph`]
 	];