Sending Messages Outside the Main Client

Two patterns exist in src/scheduled/jobs/ for posting messages from cron jobs (no NypsiClient/gateway connection available):

1. WebhookClient (discord.js) - used when a dedicated webhook URL exists in env (e.g. LOTTERY_HOOK, TOPCOMMANDS_HOOK, per-guild birthdayHook). Simple, but requires a webhook to be created/stored per destination.
2. Shared REST client (src/utils/rest.ts, getRest()) - wraps @discordjs/rest, authed with BOT_TOKEN. Post directly to a channel with rest.post(Routes.channelMessages(channelId), { body: { embeds: [...] } }). Embeds must be plain JSON (.toJSON() on CustomEmbed/EmbedBuilder instances, not the builder objects themselves). Preferred when you already know a channel ID and don't want to manage a separate webhook URL/secret (e.g. topbalance.ts posts to channel 833052442069434429 this way).

getRest(client?) returns client.rest if a NypsiClient is passed (has an active gateway connection), otherwise a standalone REST instance - use the standalone version in jobs since they don't have a client instance.