Fix stale match liveness and stop handling (Refs #136)

src/lib/server/fleet/leaderboard-ingest.ts

@@ -67,7 +67,15 @@ export function recordLeaderboardTelemetry(handle: Database.Database, report: Ga
             'SELECT * FROM leaderboard_matches WHERE server = ? AND server_deleted_at IS NULL ORDER BY id DESC LIMIT 1'
         )
         .get(report.server) as Match | undefined;
-    if (match?.last_fingerprint === signature && match.map_key === identity.key) return;
+    if (match?.last_fingerprint === signature && match.map_key === identity.key) {
+        // Unchanged gameplay still proves an open match is reporting. Keep the
+        // duplicate from changing participation, counters, or completed results.
+        if (match.status === 'active')
+            handle
+                .prepare('UPDATE leaderboard_matches SET last_received_at = ? WHERE id = ?')
+                .run(report.receivedAt, match.id);
+        if (match.status !== 'interrupted') return;
+    }
 
     const isStart = report.event === 'game_start';
     const round = isStart ? 0 : report.round;