Enhancement: fetch mails in bulk (#5249)

Co-authored-by: Trenton H <797416+stumpylog@users.noreply.github.com>

src/paperless_mail/mail.py

@@ -569,6 +569,7 @@ class MailAccountHandler(LoggingMixin):
                 criteria=criterias,
                 mark_seen=False,
                 charset=rule.account.character_set,
+                bulk=True,
             )
         except Exception as err:
             raise MailError(

src/paperless_mail/tests/test_mail.py

@@ -118,7 +118,7 @@ class BogusMailBox(AbstractContextManager):
         if username != self.USERNAME or access_token != self.ACCESS_TOKEN:
             raise MailboxLoginError("BAD", "OK")
 
-    def fetch(self, criteria, mark_seen, charset=""):
+    def fetch(self, criteria, mark_seen, charset="", bulk=True):
         msg = self.messages
 
         criteria = str(criteria).strip("()").split(" ")