Create a POST endpoint `/api/federation/register-all` in `webServer.js` to upsert all servers the Discord client is connected to into the `federation_servers` table, using `guild_id` as the conflict target.
Replit-Commit-Author: Agent
Replit-Commit-Session-Id: aed2e46d-25bb-4b73-81a1-bb9e8437c261
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 31d9f5da-0c63-4f85-a2fa-50807ff47f17
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/3bdfff67-975a-46ad-9845-fbb6b4a4c4b5/aed2e46d-25bb-4b73-81a1-bb9e8437c261/2a77Jky
Replit-Helium-Checkpoint-Created: true