Backend MP4 conversion (#23)

* ADD conversion queue

* ADD RemuxService for MP4 conversion

* REMOVE unused conversion queue

* REORGANISE Job-related classes

* ADD Job stages

* REVERT to old commit, using Spring Async instead

* ADD asynchronous processing for video tasks

* PATCH and streamline progress tracking

* ADD asynchronous video processing and job restructuring

* REFACTOR job service method

* ADD job remux functionality

* ADD remuxing endpoint

* PATCH complete flag not updating in API response

* ADD progress type in frontend

* ADD reset functionality for job status

* PATCH missing progress bar for subsequent exports

* REDESIGN settings box

* ADD tracking video file conversion in frontend

* PATCH extension bug

* REMOVE autowired decorator

src/main/java/com/ddf/vodsystem/dto/ProgressTracker.java

@@ -1,19 +1,30 @@
 package com.ddf.vodsystem.dto;
 
-import lombok.Getter;
-
-@Getter
 public class ProgressTracker {
-    private float progress;
+    private float progress = 0.0f;
+    private boolean isComplete = false;
 
-    public ProgressTracker(float initialProgress) {
-        this.progress = initialProgress;
+    public synchronized float getProgress() {
+        return progress;
     }
 
-    public void setProgress(float newProgress) {
+    public synchronized boolean isComplete() {
+        return isComplete;
+    }
+
+    public synchronized void setProgress(float newProgress) {
         if (newProgress < 0 || newProgress > 1) {
             throw new IllegalArgumentException("Progress must be between 0 and 1");
         }
         this.progress = newProgress;
     }
+
+    public synchronized void markComplete() {
+        this.isComplete = true;
+    }
+
+    public synchronized void reset() {
+        this.progress = 0.0f;
+        this.isComplete = false;
+    }
 }