Set blindbit new block sync attempts at 4

src/main.rs

@@ -369,7 +369,7 @@ async fn handle_zmq(zmq_url: String, blindbit_url: String) {
 
                     // Add retry logic for hashblock processing
                     let mut retry_count = 0;
-                    const MAX_RETRIES: u32 = 3;
+                    const MAX_RETRIES: u32 = 4;
                     const RETRY_DELAY_MS: u64 = 1000; // 1 second initial delay
 
                     loop {