Real-time Business Intelligence dashboards for cooperative supermarkets
built on top of Point of Sale data. Extends the standard
``report.pos.order`` view to expose new dimensions that the standard POS
analysis lacks:

* **Cooperative member dimension** — ``is_member_at_date`` flags each
  ticket line according to the customer's share status *at the order
  date*, so historic comparisons (members vs. non-members) reflect the
  reality of the moment.
* **Category hierarchy** — ``categ_root_id`` (family) and
  ``categ_parent_id`` (subfamily) derived from
  ``product.category.parent_path``, ready to drive drilldowns.
* **Time dimensions** — ``date_day``, ``hour_of_day``, ``day_of_week``
  for daily/weekly/hourly distributions.

Pre-configured menu entries under *Point of Sale → Reporting →
Cooperative Dashboards* cover overview, members vs. non-members,
categories, top products, day-of-week and hour-of-day analyses. Four
dashboard tiles surface the most important KPIs on the
``web_dashboard_tile`` board.

The companion module ``spreadsheet_dashboard_pos_cooperative`` publishes
spreadsheet dashboards in Odoo's *Dashboards* menu that consume the
same data.
