- Add read_blockchain_env helper to parse /etc/aitbc/blockchain.env configuration
- Add normalize_rpc_url helper to parse and normalize RPC endpoint URLs
- Add probe_rpc_node to query /health and /rpc/head endpoints with latency tracking
- Add get_network_snapshot to probe local node and p2p_peers from config
- Update network status to show real connected node count and sync status
- Update network peers to show actual peer endpoints and connection