(B) Add visit related entities

Clinics.Backend/Domain/Entities/Visits/Relations/VisitMedicalImages/VisitMedicalImage.cs

+using Domain.Entities.Medicals.MedicalImages;
+using Domain.Primitives;
+
+namespace Domain.Entities.Visits.Relations.VisitMedicalImages;
+
+// TODO: Convert result to a value object
+public sealed class VisitMedicalImage(int id) : Entity(id)
+{
+    #region Properties
+
+    #region Visit
+
+    public int VisitId { get; set; }
+    public Visit Visit { get; set; } = null!;
+
+    #endregion
+
+    #region Medical image
+
+    public int MedicalImageId { get; set; }
+    public MedicalImage MedicalImage { get; set; } = null!;
+
+    #endregion
+
+    #region Additional
+
+    public string? Result { get; set; }
+
+    #endregion
+
+    #endregion
+}

Clinics.Backend/Domain/Entities/Visits/Relations/VisitMedicalTests/VisitMedicalTest.cs

+using Domain.Entities.Medicals.MedicalTests;
+using Domain.Primitives;
+
+namespace Domain.Entities.Visits.Relations.VisitMedicalTests;
+
+// TODO: Convert result to a value object
+public sealed class VisitMedicalTest(int id) : Entity(id)
+{
+    #region Properties
+
+    #region Visit
+
+    public int VisitId { get; set; }
+    public Visit Visit { get; set; } = null!;
+
+    #endregion
+
+    #region Medical test
+
+    public int MedicalTestId { get; set; }
+    public MedicalTest MedicalTest { get; set; } = null!;
+
+    #endregion
+
+    #region Additional
+
+    public string? Result { get; set; }
+
+    #endregion
+
+    #endregion
+}

Clinics.Backend/Domain/Entities/Visits/Relations/VisitMedicines/VisitMedicine.cs

+using Domain.Entities.Medicals.Medicines;
+using Domain.Primitives;
+
+namespace Domain.Entities.Visits.Relations.VisitMedicines;
+
+public sealed class VisitMedicine(int id) : Entity(id)
+{
+    #region Properties
+
+    #region Visit
+
+    public int VisitId { get; set; }
+    public Visit Visit { get; set; } = null!;
+
+    #endregion
+
+    #region Medicine
+
+    public int MedicineId { get; set; }
+    public Medicine Medicine { get; set; } = null!;
+
+    #endregion
+
+    #region Additional
+
+    public int Number { get; set; }
+
+    #endregion
+
+    #endregion
+}

Clinics.Backend/Domain/Entities/Visits/Visit.cs

+using Domain.Entities.Medicals.Hospitals;
+using Domain.Entities.People.Doctors;
+using Domain.Entities.People.Patients;
+using Domain.Entities.Visits.Relations.VisitMedicalImages;
+using Domain.Entities.Visits.Relations.VisitMedicalTests;
+using Domain.Entities.Visits.Relations.VisitMedicines;
+using Domain.Primitives;
+
+namespace Domain.Entities.Visits;
+
+public sealed class Visit(int id) : Entity(id)
+{
+    #region Properties
+
+    public Patient Patient { get; set; } = null!;
+
+    public Doctor Doctor { get; set; } = null!;
+
+    public Hospital? Hospital { get; set; }
+
+    public DateOnly Date { get; set; }
+
+    public string Diagnosis { get; set; } = null!;
+
+    #region Navigations
+
+    public ICollection<VisitMedicalImage> MedicalImages { get; set; } = [];
+    public ICollection<VisitMedicalTest> MedicalTests { get; set; } = [];
+    public ICollection<VisitMedicine> Medicines { get; set; } = [];
+
+    #endregion
+
+    #endregion
+}