Store training tip embeddings in column (attachment=False)

Binary fields default to attachment storage in Odoo 19, but FAISS
embedding vectors need to be loaded in bulk via direct SQL for
performance. Using attachment=False stores them in the table column.

Made-with: Cursor

encoach_training/models/training_tip.py

@@ -24,7 +24,7 @@ class EncoachTrainingTip(models.Model):
         string="Category",
     )
     content = fields.Text(required=True)
-    embedding = fields.Binary(string="FAISS Embedding Vector")
+    embedding = fields.Binary(string="FAISS Embedding Vector", attachment=False)
 
     def action_compute_embeddings(self):
         """Compute sentence-transformer embeddings for tips missing them."""