Initial commit: OCA Ai packages (4 packages)

odoo-bringout-oca-ai-ai_oca_bridge/doc/MODELS.md

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+# Models
+
+Detected core models and extensions in ai_oca_bridge.
+
+```mermaid
+classDiagram
+    class ai_bridge
+    class ai_bridge_execution
+    class ai_bridge_thread
+    class ir_model
+    class mail_thread
+```
+
+Notes
+- Classes show model technical names; fields omitted for brevity.
+- Items listed under _inherit are extensions of existing models.