feat(Fundamentals): add fundamentals service

FinlyticFundamentals/Entities/CompanyExecutiveEntity.cs

@@ -0,0 +1,28 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using System.Text.Json.Serialization;
+
+namespace FinlyticFundamentals.Entities;
+
+/// <summary>
+/// Relational executive board table linked to the main fundamentals entity by ISIN.
+/// </summary>
+public class CompanyExecutiveEntity
+{
+    [Key]
+    public Guid Id { get; set; } = Guid.NewGuid();
+
+    [Required]
+    public string Isin { get; set; } = string.Empty;
+
+    [JsonIgnore]
+    public AssetFundamentalsEntity? AssetFundamentals { get; set; }
+
+    [Required]
+    public string Name { get; set; } = string.Empty;
+
+    [Required]
+    public string Title { get; set; } = string.Empty;
+    public int? Age { get; set; }
+    public decimal? Compensation { get; set; }
+}