Initial commit: Mail packages

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

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+# Models
+
+Detected core models and extensions in test_mail_sms.
+
+```mermaid
+classDiagram
+    class mail_test_sms
+    class mail_test_sms_bl
+    class mail_test_sms_bl_activity
+    class mail_test_sms_bl_optout
+    class mail_test_sms_partner
+    class mail_test_sms_partner_2many
+    class sms_test_nothread
+```
+
+Notes
+- Classes show model technical names; fields omitted for brevity.
+- Items listed under _inherit are extensions of existing models.