feat(swarm): Implement decentralized node discovery and content federation system

- Add swarm node registry with discovery, gossip, and timeline synchronization
- Implement database schema for swarm nodes, seeds, and sync logs with proper indexing
- Create swarm API endpoints for node discovery, gossip protocol, timeline sharing, and announcements
- Add content moderation features with NSFW flagging and muted nodes support
- Implement user settings pages for content filtering and node moderation
- Add background scheduler for automated swarm synchronization and node health checks
- Create .well-known endpoint for swarm protocol discovery
- Remove legacy bot-cron.ts in favor of integrated scheduler system
- Add user account NSFW preferences and age verification tracking
- Update database schema with swarm-related tables and user moderation fields
- Enhance post and user components to support federated content display
- Add instrumentation for monitoring swarm operations and node health

src/lib/types.ts

@@ -61,4 +61,5 @@ export interface Post {
         handle: string;
         ownerId: string;
     } | null;
+    nodeDomain?: string | null; // Domain of the node this post came from (for swarm posts)
 }