fix(loyalty): update delete tests for soft-delete behavior

Delete program tests now verify soft-delete (deleted_at set, record
hidden from normal queries) instead of expecting hard deletion.
Uses db.query() instead of db.get() since the soft-delete filter
only applies to ORM queries, not identity map lookups.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/loyalty/tests/integration/test_admin_api.py

@@ -213,7 +213,7 @@ class TestAdminDeleteProgram:
     def test_delete_program(
         self, client, super_admin_headers, admin_program, db
     ):
-        """Admin can delete any program."""
+        """Admin can soft-delete any program."""
         program_id = admin_program.id
 
         response = client.delete(
@@ -222,10 +222,21 @@ class TestAdminDeleteProgram:
         )
         assert response.status_code == 204
 
-        # Verify deleted
-        deleted = db.get(LoyaltyProgram, program_id)
+        # Verify soft-deleted (hidden from normal queries)
+        db.expire_all()
+        deleted = db.query(LoyaltyProgram).filter(LoyaltyProgram.id == program_id).first()
         assert deleted is None
 
+        # But visible with include_deleted
+        visible = (
+            db.query(LoyaltyProgram)
+            .execution_options(include_deleted=True)
+            .filter(LoyaltyProgram.id == program_id)
+            .first()
+        )
+        assert visible is not None
+        assert visible.deleted_at is not None
+
     def test_delete_nonexistent_program(
         self, client, super_admin_headers
     ):

app/modules/loyalty/tests/integration/test_merchant_api.py

@@ -233,7 +233,7 @@ class TestMerchantDeleteProgram:
     def test_delete_program_success(
         self, client, loyalty_merchant_headers, loyalty_store_setup, db
     ):
-        """Delete the merchant's loyalty program."""
+        """Soft-delete the merchant's loyalty program."""
         program_id = loyalty_store_setup["program"].id
 
         response = client.delete(
@@ -241,12 +241,23 @@ class TestMerchantDeleteProgram:
         )
         assert response.status_code == 204
 
-        # Verify program is deleted
+        # Verify soft-deleted (hidden from normal queries)
         from app.modules.loyalty.models import LoyaltyProgram
 
-        deleted = db.get(LoyaltyProgram, program_id)
+        db.expire_all()
+        deleted = db.query(LoyaltyProgram).filter(LoyaltyProgram.id == program_id).first()
         assert deleted is None
 
+        # But visible with include_deleted
+        visible = (
+            db.query(LoyaltyProgram)
+            .execution_options(include_deleted=True)
+            .filter(LoyaltyProgram.id == program_id)
+            .first()
+        )
+        assert visible is not None
+        assert visible.deleted_at is not None
+
     def test_delete_program_not_found(
         self, client, loyalty_merchant_headers_no_program
     ):