Add structured logging and better error handling

internal/jobs/restore.go

@@ -2,6 +2,7 @@ package jobs
 
 import (
 	"io/fs"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -20,12 +21,14 @@ func (manager *Manager) RestoreExisting() error {
 	}
 
 	var queuedJobs []*Job
+	restoredCount := 0
 	for _, entry := range entries {
 		if !entry.IsDir() || !jobIDPattern.MatchString(entry.Name()) {
 			continue
 		}
 		job := manager.restoreJob(entry)
 		manager.store(job)
+		restoredCount++
 		if job.status == StatusQueued {
 			queuedJobs = append(queuedJobs, job)
 		}
@@ -38,6 +41,7 @@ func (manager *Manager) RestoreExisting() error {
 		job.workers.Add(1)
 		manager.launchDownload(job)
 	}
+	slog.Info("restored downloads", "total", restoredCount, "resuming", len(queuedJobs))
 	return nil
 }