Preserve deleted server history

Retain historical server identities, results, and evidence after deletion. Mark archived entries as Deleted and prevent old work from targeting servers that reuse the same name.

Fixes #16.

src/lib/server/fleet/match-history.ts

@@ -6,7 +6,7 @@ export function serverMatchHistory(server?: string, limit = 25): { matches: Serv
     const where = `WHERE m.highest_round >= ${MIN_RECORDED_ROUND}${server === undefined ? '' : ' AND m.server = ?'}`;
     const parameters = server === undefined ? [] : [server];
     const total = (handle.prepare(`SELECT COUNT(*) AS total FROM leaderboard_matches m ${where}`).get(...parameters) as { total: number }).total;
-    const matches = handle.prepare(`SELECT m.id, m.server, m.map_name AS map, m.started_at AS startedAt, m.status,
+    const matches = handle.prepare(`SELECT m.id, m.server, m.server_deleted_at, m.map_name AS map, m.started_at AS startedAt, m.status,
         CASE WHEN m.status = 'completed' THEN m.ended_at END AS endedAt,
         m.start_players AS startPlayers,
         (SELECT COUNT(*) FROM leaderboard_match_players p WHERE p.match_id = m.id) AS uniquePlayers,