Fix keyed telemetry match attribution (Refs #144)

src/lib/server/db/leaderboard-reports.ts

@@ -0,0 +1,29 @@
+import type Database from 'better-sqlite3';
+
+/** Reporter identities and received sequences survive controller restarts with match history. */
+export function migrateLeaderboardReports(handle: Database.Database): void {
+    const columns = new Set(
+        (handle.prepare('PRAGMA table_info(leaderboard_matches)').all() as { name: string }[]).map(
+            (column) => column.name
+        )
+    );
+    for (const [name, definition] of [
+        ['reporter_match_key', 'TEXT'],
+        ['last_seq', 'INTEGER NOT NULL DEFAULT 0'],
+        ['report_count', 'INTEGER NOT NULL DEFAULT 0']
+    ]) {
+        if (!columns.has(name))
+            handle.exec(`ALTER TABLE leaderboard_matches ADD COLUMN ${name} ${definition}`);
+    }
+    handle.exec(`
+        CREATE UNIQUE INDEX IF NOT EXISTS idx_leaderboard_reporter_match
+            ON leaderboard_matches(server, reporter_match_key)
+            WHERE reporter_match_key IS NOT NULL;
+        CREATE TABLE IF NOT EXISTS leaderboard_match_reports (
+            match_id INTEGER NOT NULL REFERENCES leaderboard_matches(id) ON DELETE CASCADE,
+            seq INTEGER NOT NULL CHECK (typeof(seq) = 'integer' AND seq > 0),
+            applied INTEGER NOT NULL CHECK (applied IN (0,1)),
+            PRIMARY KEY (match_id, seq)
+        );
+    `);
+}

src/lib/server/db/migrations.ts

@@ -16,6 +16,7 @@ import { enableIncrementalVacuum, retentionClocks } from './retention-clocks.js'
 import { migrateHostSchema } from '../hosts/schema.js';
 import { migrateAuthSchema, migrateSuperViewerRole } from '../auth/schema.js';
 import { migrateGameFileSchema } from '../game-files/schema.js';
+import { migrateLeaderboardReports } from './leaderboard-reports.js';
 import type { Migration } from './migration-runner.js';
 
 // Append only: never renumber entries or change an applied migration to add an
@@ -97,6 +98,11 @@ export const migrations: readonly Migration[] = [
         name: 'super viewer authentication role',
         mode: 'foreign-keys-off',
         run: migrateSuperViewerRole
+    },
+    {
+        version: 18,
+        name: 'durable leaderboard report identity and sequences',
+        run: migrateLeaderboardReports
     }
 ];