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>

.architecture-rules.yaml

@@ -432,6 +432,8 @@ javascript_rules:
       exceptions:
         - "// eslint-disable"
         - "console.log('✅"  # Bootstrap messages allowed
+      auto_exclude_files:
+        - "init-*.js"  # Init files run before logger is available
 
   - id: "JS-002"
     name: "Use lowercase apiClient for API calls"