[IMP] mail: reduce message_post query count and clean code

Purpose of this commit is to improve performance of post and notify through
various code improvements.

Containing
  * making of _notify_customize_recipients a mail.thread method;
  * _message_auto_subscribe_followers optimized;
  * renaming and optimisation of _notify_partners;
  * message_post_attachements optization;
  * remove unused mail_post_autofollow_partner_ids context key;
  * minimize message create queries;
  * only check record related access right for thread messages not in pending
    moderation;
  * get attachements from values instead of db;
  * storing lang in ctx from the beginning;
  * don't track on write on attachments;

Related to task 1943901
Linked to PR #32404

1 files changed, 1 insertions, 1 deletions

diff --git a/addons/mail/wizard/mail_compose_message.py b/addons/mail/wizard/mail_compose_message.py
index 2db6a3d8324..1d54406b086 100644
--- a/addons/mail/wizard/mail_compose_message.py
+++ b/addons/mail/wizard/mail_compose_message.py
@@ -367,7 +367,7 @@ class MailComposer(models.TransientModel):
                     mail_values.pop('attachments', []),
                     attachment_ids,
                     {'model': 'mail.message', 'res_id': 0}
-                )
+                )['attachment_ids']
                 # Filter out the blacklisted records by setting the mail state to cancel -> Used for Mass Mailing stats
                 if res_id in blacklisted_rec_ids:
                     mail_values['state'] = 'cancel'