feat: Portal, Email Inbound, Discuss + module improvements

- Portal: /my/* routes, signup, password reset, portal user support
- Email Inbound: IMAP polling (go-imap/v2), thread matching
- Discuss: mail.channel, long-polling bus, DM, unread count
- Cron: ir.cron runner (goroutine scheduler)
- Bank Import, CSV/Excel Import
- Automation (ir.actions.server)
- Fetchmail service
- HR Payroll model
- Various fixes across account, sale, stock, purchase, crm, hr, project

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

addons/account/models/init.go

@@ -28,4 +28,12 @@ func Init() {
 	initAccountSequence()
 	initAccountEdi()
 	initAccountReconcileModel()
+	initAccountMoveInvoiceExtensions()
+	initAccountPaymentExtensions()
+	initAccountJournalExtensions()
+	initAccountTaxComputes()
+	initAccountReportWizard()
+	initAccountMoveReversal()
+	initAccountMoveTemplate()
+	initAccountReconcilePreview()
 }