Enhancement: Allow excluding mail attachments by name (#4691)

* Adds new filtering to exclude attachments from processing

* Frontend use include / exclude mail rule filename filters

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

src/paperless_mail/models.py

@@ -139,8 +139,8 @@ class MailRule(document_models.ModelWithOwner):
         blank=True,
     )
 
-    filter_attachment_filename = models.CharField(
-        _("filter attachment filename"),
+    filter_attachment_filename_include = models.CharField(
+        _("filter attachment filename inclusive"),
         max_length=256,
         null=True,
         blank=True,
@@ -151,6 +151,18 @@ class MailRule(document_models.ModelWithOwner):
         ),
     )
 
+    filter_attachment_filename_exclude = models.CharField(
+        _("filter attachment filename exclusive"),
+        max_length=256,
+        null=True,
+        blank=True,
+        help_text=_(
+            "Do not consume documents which entirely match this "
+            "filename if specified. Wildcards such as *.pdf or "
+            "*invoice* are allowed. Case insensitive.",
+        ),
+    )
+
     maximum_age = models.PositiveIntegerField(
         _("maximum age"),
         default=30,