chore(config): add AIService mock configuration to mockery

- Add AIService interface to mockery configuration
- Enable mock generation for AI service testing
- Required for query command test suite

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

Author: AnnatarHe

.mockery.yml

@@ -22,3 +22,7 @@ packages:
         config:
           dir: "{{.InterfaceDir}}"
           filename: "mock_{{.InterfaceName}}.go"
+      AIService:
+        config:
+          dir: "{{.InterfaceDir}}"
+          filename: "mock_{{.InterfaceName}}.go"