fix: P2P connectivity broken - containers isolated at 0 peers

Current state: All 9 CHORUS containers show "📊 Status: 0 connected peers"
and "❌ No winner found in election". P2P connectivity completely broken.

Issues:
- libp2p AutoRelay was attempted to be fixed but connectivity still failing
- Elections cannot receive candidacy or votes due to isolation
- Task Execution Engine (v0.5.0) implementation completed but P2P regressed

Status: Need to compare with pre-Task-Engine baseline to identify root cause
Next: Checkout working version before d1252ad to find what broke connectivity

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

docker/docker-compose.yml

@@ -2,7 +2,7 @@ version: "3.9"
 
 services:
   chorus:
-    image: anthonyrawlins/chorus:discovery-debug
+    image: anthonyrawlins/chorus:v0.5.4-p2p-fix
     
     # REQUIRED: License configuration (CHORUS will not start without this)
     environment: