fix(cron): crash when errors are encountered during a backup (#403)

internal/cron.go

@@ -1,12 +1,22 @@
 package internal
 
+import (
+	"errors"
+	"fmt"
+)
+
 func RunCron() error {
 	c := GetConfig()
+	var errs []error
 	for name, l := range c.Locations {
 		l.name = name
 		if err := l.RunCron(); err != nil {
-			return err
+			errs = append(errs, err)
 		}
 	}
+
+	if len(errs) > 0 {
+		return fmt.Errorf("Encountered errors during cron process:\n%w", errors.Join(errs...))
+	}
 	return nil
 }