feat: add extended CLI command routing and update P2P architecture documentation

- Added 135-line command interceptor in unified_cli.py for 75+ advanced commands
- Implemented routing for contract, mining, agent, network, wallet, AI, resource, ollama, marketplace, economics, analytics, automate, cluster, performance, security, compliance, script, and API commands
- Added dynamic kwargs extraction from raw_args for command parameters
- Added fallback to extended_features.py backend for stateful command

docs/advanced/02_reference/8_blockchain-deployment-summary.md

@@ -84,7 +84,7 @@ To connect nodes in a production network:
 ### 2. Gossip Backend
 - Use Redis for distributed gossip:
   ```env
-  GOSSIP_BACKEND=redis
+  GOSSIP_BACKEND=memory
   GOSSIP_BROADCAST_URL=redis://redis-server:6379/0
   ```