Removes the duplicate `client.once("ready", ...)` handler from `bot.js` to prevent duplicate startup messages and processes. Simplifies the message handling in `messageCreate.js` to exclusively sync messages from the configured `DISCORD_MAIN_CHAT_CHANNELS`, ignoring other channel types.
Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 9203795e-937a-4306-b81d-b4d5c78c240e
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Add an HTTP endpoint to the Discord bot to receive posts from the main server and call the Discord API to send these posts as rich embeds to the configured feed channel. Also, update the main server to call this new Discord bot endpoint when a new post is created.
Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 9203795e-937a-4306-b81d-b4d5c78c240e
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