feat: migrate CLOB client to V2-only trading

examples/demo.rs

@@ -94,21 +94,19 @@ impl PolyfillDemo {
     /// Create a new demo
     pub fn new() -> Result<Self> {
         // Create basic client
-        let client = ClobClient::new("https://clob.polymarket.com");
-
-        // Create advanced client with configuration
-        let _config = ClientConfig {
-            base_url: "https://clob.polymarket.com".to_string(),
-            chain_id: 137,                  // Polygon
-            private_key: None,              // Would be set in production
-            api_credentials: None,          // Would be set in production
-            max_slippage: Some(dec!(0.01)), // 1% max slippage
-            fee_rate: Some(dec!(0.02)),     // 2% fee rate
+        let config = ClientConfig {
+            base_url: "https://clob-v2.polymarket.com".to_string(),
+            chain: 137,
+            private_key: None,
+            api_credentials: None,
+            builder_code: None,
             timeout: Some(Duration::from_secs(30)),
             max_connections: Some(100),
         };
+        let client = ClobClient::new(&config.base_url);
 
-        let advanced_client = PolyfillClient::new("https://clob.polymarket.com");
+        // Create advanced client with configuration
+        let advanced_client = PolyfillClient::from_config(config.clone())?;
 
         // Create order book manager
         let book_manager = OrderBookManager::new(100);