refactor: Migrate from ActivityPub federation to native Swarm network

- Remove ActivityPub infrastructure (webfinger, nodeinfo, inbox, activities, signatures)
- Implement native peer-to-peer Swarm network with gossip protocol
- Replace federated timeline with Swarm timeline aggregating posts from all nodes
- Migrate direct messaging to end-to-end encrypted Swarm Chat system
- Update user interactions (follow, like, repost) to use Swarm protocol
- Add cryptographic key management for DID-based identity system
- Remove server-bound identity model in favor of portable DID identities
- Update documentation to reflect Swarm architecture and capabilities
- Add debug utilities and chat testing tools for Swarm network
- Refactor database schema to support distributed user directory
- Update bot framework to work with Swarm network interactions
- Simplify API routes to use Swarm protocol instead of ActivityPub
- This transition enables true peer-to-peer communication, instant interactions, and encrypted messaging while maintaining sovereign identity through DIDs

src/lib/swarm/index.ts

@@ -7,7 +7,7 @@
  * 1. Seed nodes (like node.synapsis.social) provide initial bootstrap
  * 2. Gossip protocol spreads node/handle information epidemically
  * 3. Any node can discover the full network without central authority
- * 4. Direct node-to-node interactions (likes, follows, etc.) bypass ActivityPub
+ * 4. Direct node-to-node interactions (likes, follows, etc.) for instant delivery
  * 
  * Usage:
  * - On node startup: call announceToSeeds() to register with the network

src/lib/swarm/interactions.ts

@@ -2,8 +2,7 @@
  * Swarm Interactions
  * 
  * Handles direct node-to-node interactions in the swarm network.
- * This is the "Swarm-first" approach - we try direct swarm communication
- * first, and fall back to ActivityPub for non-Synapsis nodes.
+ * All interactions are delivered directly via the swarm protocol.
  * 
  * Supported interactions:
  * - Likes: Direct like delivery between swarm nodes

src/lib/swarm/timeline.ts

@@ -190,11 +190,9 @@ export async function fetchSwarmTimeline(
       : result.posts.filter(p => !p.isNsfw && !p.nodeIsNsfw);
 
     // Log filtering details for debugging
-    if (!includeNsfw && result.posts.length > 0) {
-      const nsfwPosts = result.posts.filter(p => p.isNsfw);
-      const nodeNsfwPosts = result.posts.filter(p => p.nodeIsNsfw);
-      console.log(`[Swarm Timeline] ${result.domain}: ${result.posts.length} posts, ${nsfwPosts.length} marked NSFW, ${nodeNsfwPosts.length} from NSFW node, ${filteredPosts.length} after filter`);
-    }
+    const nsfwPosts = result.posts.filter(p => p.isNsfw);
+    const nodeNsfwPosts = result.posts.filter(p => p.nodeIsNsfw);
+    console.log(`[Swarm Timeline] ${result.domain}: ${result.posts.length} posts fetched, ${nsfwPosts.length} marked NSFW, ${nodeNsfwPosts.length} from NSFW node, ${filteredPosts.length} after filter (includeNsfw: ${includeNsfw})`);
 
     sources.push({
       domain: result.domain,