Implement file deletion after successful uploads in runner and encoding processes

- Added logic to delete files after successful uploads in both runner and encode tasks to prevent duplicate uploads.
- Included logging for any errors encountered during file deletion to ensure visibility of issues.

internal/runner/runner.go

@@ -289,6 +289,10 @@ func (r *Runner) uploadOutputs(ctx *tasks.Context, job *api.NextJobResponse) err
 			log.Printf("Failed to upload %s: %v", filePath, err)
 		} else {
 			ctx.OutputUploaded(entry.Name())
+			// Delete file after successful upload to prevent duplicate uploads
+			if err := os.Remove(filePath); err != nil {
+				log.Printf("Warning: Failed to delete file %s after upload: %v", filePath, err)
+			}
 		}
 	}