Added Comprehensive Test Cases and Achieved 100% Test Coverage

Description

This merge request implements comprehensive test cases across the FarmForce project to improve application reliability, maintainability, and stability. The update significantly increases backend and service-level test coverage while validating critical workflows, API functionality, and edge-case handling.

Changes Implemented

Test Coverage Enhancements

• Added unit test cases for core services, utilities, and helper modules
• Implemented integration tests for API endpoints and workflow validations
• Covered authentication and authorization related scenarios
• Added validation tests for request/response handling
• Implemented error handling and fallback scenario tests
• Added edge-case validations across critical modules
• Covered asynchronous/background task workflows
• Verified database interaction and service behavior

Improvements

• Improved reliability of application workflows
• Enhanced maintainability through structured test suites
• Reduced risk of regressions during future development
• Added coverage reporting and validation support
• Mocked external dependencies and third-party integrations where required

Coverage

• Achieved 100% test coverage for implemented modules
• Ensured all critical workflows are validated successfully
• Verified API response consistency and business logic correctness

Validation

• All test cases pass successfully
• No breaking changes introduced to existing functionality
• Coverage reports generated and reviewed successfully

Outcome

This MR strengthens the FarmForce backend testing infrastructure by establishing a robust and scalable testing foundation for future feature development and deployment stability.

Closes #7 (closed)