refactor(media): consolidate upload/edit/download into MediaService

Merge UploadService, EditService, JobOrchestrationService, and
DownloadService into a single MediaService with a unified Job lifecycle
(READY → PROCESSING → SUCCEEDED/FAILED via JobState enum).

- Add MediaController (/api/v1/media) exposing compress, save, and clip
- Add JobController (/api/v1/job) for status polling and file download
- Move clip/thumbnail download into ClipController (/{id}/media, /{id}/thumbnail)
- Move stream saveSection/clip from StreamService into MediaService
- Simplify Job DTO: remove dual ClipOptions/files, add ProgressTracker and download file
- Refactor JobRegistryService.add() → generateJob() to co-locate creation and registration
- Wire FFmpeg out_time_ms progress parsing into StreamActionsService via CommandRunner
- Rename GET /api/v1/auth/user → GET /api/v1/user/me
- Delete DownloadController, MetadataController, UploadController

src/main/java/com/ddf/vodsystem/services/media/CommandRunner.java

@@ -1,14 +1,19 @@
 package com.ddf.vodsystem.services.media;
 
 import com.ddf.vodsystem.dto.CommandOutput;
+import com.ddf.vodsystem.dto.ProgressTracker;
 
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.util.List;
 import java.util.function.Consumer;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 public class CommandRunner {
+    private static final Pattern timePattern = Pattern.compile("out_time_ms=(\\d+)");
+
     public static CommandOutput run(List<String> command, Consumer<String> onOutput) throws IOException, InterruptedException {
         ProcessBuilder processBuilder = new ProcessBuilder(command);
         processBuilder.redirectErrorStream(true);
@@ -40,6 +45,14 @@ public class CommandRunner {
         return run(command, null);
     }
 
+    public static void setProgress(String line, ProgressTracker progress, float length) {
+        Matcher matcher = timePattern.matcher(line);
+        if (matcher.find()) {
+            float timeInMs = Float.parseFloat(matcher.group(1)) / 1000000f;
+            progress.setProgress(timeInMs / length);
+        }
+    }
+
     private CommandRunner() {
         // Private constructor to prevent instantiation
     }