- Add Skill navigation properties to PhaseSection and ProjectSection, with EF Core mappings and migration for foreign keys and indexes.
- Refactor SetSkillFlags in GetProjectsListQueryHandler for clarity and efficiency; use eager loading for Skill.
- Add HasRemainingTime() to TaskSection and enforce time check in ChangeStatusSectionCommandHandler.
- Optimize EmployeeDocumentsRepository queries; add EmployeeId to WorkshopWithEmployeeDocumentsViewModel.
- Improve CustomExceptionHandler to handle FluentValidation exceptions and return proper status codes.
- Add FluentValidation package reference and perform minor code cleanups.
