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/controllers/JobController.java

@@ -0,0 +1,69 @@
+package com.ddf.vodsystem.controllers;
+
+import com.ddf.vodsystem.controllers.dto.JobResponse;
+import com.ddf.vodsystem.dto.APIResponse;
+import com.ddf.vodsystem.dto.Job;
+import com.ddf.vodsystem.exceptions.NotReadyException;
+import com.ddf.vodsystem.services.JobRegistryService;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.io.Resource;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.MediaTypeFactory;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("api/v1/job")
+public class JobController {
+    private final JobRegistryService jobRegistryService;
+    private static final String SUCCESS = "success";
+    private static final String FILENAME_HEADER = "inline; filename=\"%s\"";
+
+    public JobController(JobRegistryService jobRegistryService){
+        this.jobRegistryService = jobRegistryService;
+    }
+
+    @GetMapping("/{uuid}")
+    public ResponseEntity<APIResponse<JobResponse>> getJob(@PathVariable String uuid) {
+        Job job = jobRegistryService.getJob(uuid);
+        JobResponse jobResponse = new JobResponse(
+                job.getUuid(),
+                job.getProgressTracker().getProgress(),
+                job.getProgressTracker().isComplete(),
+                job.getState(),
+                job.getErrorOutput(),
+                job.getCreatedAt()
+        );
+
+        return ResponseEntity.ok(new APIResponse<>(
+                SUCCESS,
+                "Job successfully retreived",
+                jobResponse
+        ));
+    }
+
+    @GetMapping("/{uuid}/download")
+    public ResponseEntity<Resource> downloadJobFile(@PathVariable String uuid) {
+        Job job = jobRegistryService.getJob(uuid);
+
+        if (job.getDownload() == null) {
+            throw new NotReadyException("Job " + uuid + " not ready for download.");
+        }
+
+        Resource resource = new FileSystemResource(job.getDownload());
+
+        if (!resource.exists()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        return ResponseEntity.ok()
+                .header(HttpHeaders.CONTENT_DISPOSITION, String.format(FILENAME_HEADER, resource.getFilename()))
+                .contentType(MediaTypeFactory.getMediaType(resource).orElse(MediaType.APPLICATION_OCTET_STREAM))
+                .body(resource);
+    }
+
+}