edit FileProducer to use SequencedLine

src/main/java/producer/FileProducer.java

 package producer;
 
+import model.SequencedLine;
 import java.io.BufferedReader;
 import java.io.FileReader;
 import java.io.IOException;
@@ -8,11 +9,12 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 public class FileProducer implements Runnable {
     private final String inputFilePath;
-    private final BlockingQueue<String> inputQueue;
+    private final BlockingQueue<SequencedLine> inputQueue;
     private final AtomicBoolean productionFinished;
+    private int sequenceCounter = 0;
 
     public FileProducer(String inputFilePath,
-                        BlockingQueue<String> inputQueue,
+                        BlockingQueue<SequencedLine> inputQueue,
                         AtomicBoolean productionFinished) {
         this.inputFilePath = inputFilePath;
         this.inputQueue = inputQueue;
@@ -31,7 +33,9 @@ public class FileProducer implements Runnable {
             while ((line = reader.readLine()) != null) {
                 if (!line.trim().isEmpty()) {
                     // Put line in queue - will wait if queue is full
-                    inputQueue.put(line);
+                    SequencedLine sequencedLine = new SequencedLine(sequenceCounter, line);
+                    sequenceCounter++; // Prepare for next line
+                    inputQueue.put(sequencedLine);
                     lineCount++;
 
                     // Progress reporting every 50 lines