fix: add bin_location to inventory fixtures and service

- Add warehouse and bin_location fields to test fixtures
- Update InventoryService to include warehouse/bin_location when creating entries
- Fix all Inventory model instantiations in tests to include required fields
- All 119 inventory tests now pass

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/unit/models/database/test_inventory.py

@@ -17,6 +17,8 @@ class TestInventoryModel:
         inventory = Inventory(
             product_id=test_product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="SA-10-01",
             location="WAREHOUSE_A",
             quantity=150,
             reserved_quantity=10,
@@ -31,26 +33,31 @@ class TestInventoryModel:
         assert inventory.product_id == test_product.id
         assert inventory.vendor_id == test_vendor.id
         assert inventory.location == "WAREHOUSE_A"
+        assert inventory.bin_location == "SA-10-01"
         assert inventory.quantity == 150
         assert inventory.reserved_quantity == 10
         assert inventory.available_quantity == 140  # 150 - 10
 
     def test_inventory_unique_product_location(self, db, test_vendor, test_product):
-        """Test unique constraint on product_id + location."""
+        """Test unique constraint on product_id + warehouse + bin_location."""
         inventory1 = Inventory(
             product_id=test_product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="SA-10-01",
             location="WAREHOUSE_A",
             quantity=100,
         )
         db.add(inventory1)
         db.commit()
 
-        # Same product + location should fail
+        # Same product + warehouse + bin_location should fail
         with pytest.raises(IntegrityError):
             inventory2 = Inventory(
                 product_id=test_product.id,
                 vendor_id=test_vendor.id,
+                warehouse="strassen",
+                bin_location="SA-10-01",
                 location="WAREHOUSE_A",
                 quantity=50,
             )
@@ -64,16 +71,20 @@ class TestInventoryModel:
         inventory1 = Inventory(
             product_id=test_product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="SA-10-01",
             location="WAREHOUSE_A",
             quantity=100,
         )
         db.add(inventory1)
         db.commit()
 
-        # Same product in different location should succeed
+        # Same product in different bin_location should succeed
         inventory2 = Inventory(
             product_id=test_product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="SA-10-02",
             location="WAREHOUSE_B",
             quantity=50,
         )
@@ -82,13 +93,15 @@ class TestInventoryModel:
         db.refresh(inventory2)
 
         assert inventory2.id is not None
-        assert inventory2.location == "WAREHOUSE_B"
+        assert inventory2.bin_location == "SA-10-02"
 
     def test_inventory_default_values(self, db, test_vendor, test_product):
         """Test Inventory model default values."""
         inventory = Inventory(
             product_id=test_product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="DEF-01-01",
             location="DEFAULT_LOC",
             quantity=100,
         )
@@ -104,6 +117,8 @@ class TestInventoryModel:
         inventory = Inventory(
             product_id=test_product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="PROP-01-01",
             location="PROP_TEST",
             quantity=200,
             reserved_quantity=50,
@@ -119,6 +134,8 @@ class TestInventoryModel:
         inventory = Inventory(
             product_id=test_product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="REL-01-01",
             location="REL_TEST",
             quantity=100,
         )
@@ -136,6 +153,8 @@ class TestInventoryModel:
         inventory = Inventory(
             product_id=test_product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="NOGTIN-01-01",
             location="NO_GTIN",
             quantity=100,
         )

tests/unit/models/database/test_product.py

@@ -251,6 +251,8 @@ class TestProductInventoryProperties:
         inv1 = Inventory(
             product_id=product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="SA-01-01",
             location="WAREHOUSE_A",
             quantity=100,
             reserved_quantity=10,
@@ -258,6 +260,8 @@ class TestProductInventoryProperties:
         inv2 = Inventory(
             product_id=product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="SA-01-02",
             location="WAREHOUSE_B",
             quantity=50,
             reserved_quantity=5,
@@ -311,6 +315,8 @@ class TestProductInventoryProperties:
         inv = Inventory(
             product_id=product.id,
             vendor_id=test_vendor.id,
+            warehouse="strassen",
+            bin_location="DIG-01-01",
             location="DIGITAL_LICENSES",
             quantity=10,
             reserved_quantity=2,