feat: send accepted teamer invoices to configurable email inbox

config/packages/flagception.yaml

@@ -7,3 +7,6 @@ flagception:
         stamp_invoices:
             default: false
             env: FEATURE_STAMP_INVOICES
+        datev_email:
+            default: false
+            env: FEATURE_DATEV_EMAIL

config/services.yaml

@@ -153,6 +153,11 @@ services:
               event: oneup_uploader.validation
               method: onValidate
 
+    App\EventListener\DatevEmailSubscriber:
+        arguments:
+            $datevEmailRecipient: '%env(DATEV_EMAIL_RECIPIENT)%'
+            $datevEmailSender: '%env(DATEV_EMAIL_SENDER)%'
+
     app.upload_namer:
         class: App\Service\Upload\UploadNamer
         public: true