fix: add Pydantic models for customer/inventory endpoints and align JS rules

- Add Pydantic response models for vendor customer endpoints
- Add InventoryMessageResponse for delete endpoint
- Align JS rule IDs between YAML and validation script (JS-001=logger, JS-002=apiClient)
- Add exception for init-*.js files in console logging check

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

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

models/schema/inventory.py

@@ -82,3 +82,9 @@ class InventoryListResponse(BaseModel):
     total: int
     skip: int
     limit: int
+
+
+class InventoryMessageResponse(BaseModel):
+    """Simple message response for inventory operations."""
+
+    message: str