Steps to reproduce:
- Have a large number of invoices (thousands) with l10n_cl_dte_status 'not_sent'
- Let the "Cron Job - Send document to SII" cron run and time out before it can send them all
- After a few consecutive timeouts, the cron gets deactivated by Odoo, leaving the backlog stuck and growing

Cause of the issue:
cron_send_dte_to_sii() searches for every 'not_sent' move and sends them one by one in a single unbounded loop, committing after each send but never reporting progress to the cron framework

Odoo cron worker treats a job that times out
without ever calling _notify_progress as a full failed run, even though most of the batch was actually sent and committed. After enough consecutive failures within a short time span, the cron is auto-deactivated, which is exactly what happens once daily invoice volume outpaces what a single cron run can send before the worker times out

Solution:
Report progress via ir.cron._notify_progress() after each invoice is sent. A timeout mid-run is then treated as partially done instead of failed, the cron gets rescheduled immediately instead of waiting for its daily interval, and it no longer counts towards deactivation, This lets the cron drain an arbitrarily large backlog safely over several runs instead of dying after a handful of timeouts

opw-6487236
opw-6511624

Forward-Port-Of: odoo/enterprise#129789