fix: chaintipreached streamed only in sync mode (#117)

Author: 0xNeshi

src/block_range_scanner.rs

@@ -546,6 +546,8 @@ impl<N: Network> Service<N> {
             return Err(BlockRangeScannerError::HistoricalSyncError(e.to_string()));
         }
 
+        self.send_to_subscriber(ScannerMessage::Status(ScannerStatus::ChainTipReached)).await;
+
         let Some(sender) = self.subscriber.clone() else {
             return Err(BlockRangeScannerError::ServiceShutdown);
         };
@@ -601,8 +603,6 @@ impl<N: Network> Service<N> {
 
         info!(batch_count = batch_count, "Historical sync completed");
 
-        self.send_to_subscriber(ScannerMessage::Status(ScannerStatus::ChainTipReached)).await;
-
         Ok(())
     }