nits(core): saturate delay overflow

Signed-off-by: AvhiMaz <avhimazumder5@outlook.com>

Author: AvhiMaz

crates/core/src/runloops/mod.rs

@@ -496,7 +496,7 @@ pub async fn start_block_production_runloop(
                        // Apply random execution delay to simulate out-of-order processing
                        if let Some(max_delay_ms) = transaction_execution_delay_ms {
                            if max_delay_ms > 0 {
-                                   let delay = rand::random::<u64>() % (max_delay_ms + 1);
+                                   let delay = rand::random::<u64>() % max_delay_ms.saturating_add(1);
                                tokio::time::sleep(std::time::Duration::from_millis(delay)).await;
                            }
                        }