Fix Outlook Inbox IMAP conflict, add PipelineDepth 1

Outlook IMAP lists 'Inbox' as a folder AND uses INBOX as the special inbox,
causing mbsync to fail with 'cannot use unqualified Inbox'. Excluding 'Inbox'
from Patterns lets the MaildirStore Inbox directive handle it correctly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

laptop/.config/neomutt/accounts/personal

@@ -5,7 +5,7 @@ set mbox_type	=	Maildir
 set folder	=	~/mail/outlook
 set spoolfile	=	+Inbox
 set postponed	=	+Drafts
-set trash	=	+Trash
+set trash	=	+Deleted
 
 set signature	=	~/.config/neomutt/signature
 set sendmail	=	"/usr/bin/msmtp -a outlook"