Initial commit: Core packages

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

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+# Models
+
+Detected core models and extensions in snailmail.
+
+```mermaid
+classDiagram
+    class snailmail_letter
+    class ir_actions_report
+    class mail_message
+    class mail_notification
+    class mail_thread
+    class res_company
+    class res_config_settings
+    class res_partner
+```
+
+Notes
+- Classes show model technical names; fields omitted for brevity.
+- Items listed under _inherit are extensions of existing models.