Log unsuccessful deliveries to the system log

[fritzmg]

This implements #335

[fritzmg]

Hm, the dependency checker complains about

Found shadow dependencies!
(those are used, but not listed as dependency in composer.json)

  • psr/log
      e.g. Psr\Log\LoggerInterface in src\EventListener\LogUnsuccessfulDeliveries.php:14

However this is technically not a hard dependency and thus does not necessarily need to be added as a requirement to the composer.json of this package. wdyt?

[Toflar]

However this is technically not a hard dependency and thus does not necessarily need to be added as a requirement to the composer.json of this package. wdyt?

I think this specific error we can ignore by adding a comment that logging is optional in https://github.com/terminal42/contao-notification_center/blob/main/depcheck.php

[Toflar]

PR looks correct otherwise, I guess you also tested it? :)

[fritzmg]

PR looks correct otherwise, I guess you also tested it? :)

Yes, screenshots from above are from the test 👍

[Toflar]

Thanks @fritzmg