refactor: resolve hotel name directly from HOTEL_NAME env

resolveHotelName() now returns env.HOTEL_NAME directly — the single source
of truth. The CMS hotel_name site setting and its DEFAULTS entry are removed
as dead code since they no longer influence the displayed name.

Call sites are unchanged (still await resolveHotelName()); only the lookup
behind it is gone, so the public site always shows the configured env name
with no DB round-trip and no preset.

src/lib/services/site-settings.ts

@@ -5,7 +5,6 @@ import { logger } from "@/lib/logger";
 import { redis } from "@/lib/redis";
 
 const DEFAULTS: Record<string, string> = {
-	hotel_name: "",
 	habbo_imaging_url: "/imaging",
 	logo_url: "",
 	nitro_client_url: "",
@@ -15,7 +14,7 @@ const DEFAULTS: Record<string, string> = {
 const CACHE_TTL_MS = 300_000;
 const REDIS_CACHE_KEY = "site_settings";
 // Short in-process window so repeated getters in one request (header, nav,
-// footer all read hotel_name / logo) don't each pay a Redis round-trip.
+// footer all read logo and other settings) don't each pay a Redis round-trip.
 // Redis stays the source of truth across instances.
 const MEMORY_TTL_MS = 60_000;