Initial commit: Sale packages

odoo-bringout-oca-ocb-website_event_sale/doc/MODELS.md

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+# Models
+
+Detected core models and extensions in website_event_sale.
+
+```mermaid
+classDiagram
+    class product_pricelist_item
+    class product_product
+    class product_template
+    class sale_order
+    class sale_order_line
+    class website
+```
+
+Notes
+- Classes show model technical names; fields omitted for brevity.
+- Items listed under _inherit are extensions of existing models.