(ref/test): refactor test cases

[ShantanuKumarSinha]

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[Copilot]

Pull Request Overview

This PR refactors test cases by removing unused imports, commenting out mail configuration, enabling previously disabled tests, and adding a new logging interceptor.

• Cleaned up test imports and configurations to remove unnecessary dependencies
• Enabled a previously disabled integration test for product creation
• Added a new LoggerInterceptor for request/response logging with proper Spring MVC configuration

Reviewed Changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
TestConfig.java	Commented out mail sender bean configuration for test environment
ProductServiceTest.java	Removed unused imports including ObjectMapper, UserServiceImpl, and WebClient
McProductServiceApplicationTests.java	Enabled disabled test, added MockMvc configuration, and activated test profile
EmailServiceTest.java	Reordered imports and updated commented assertion
UserServiceImpl.java	Refactored static fields to instance variables with PostConstruct initialization
LoggerInterceptor.java	Added new interceptor class for logging HTTP requests and responses
McProductServiceApplication.java	Added interceptor configuration and reorganized field declarations

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