Complete seed service implementation for Story 1.9 with database models

Campaign_Tracker.Server/Seed/Models/EscalationRule.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace Campaign_Tracker.Server.Seed.Models;
+
+public class EscalationRule
+{
+    public int Id { get; set; }
+    
+    [Required]
+    [StringLength(100)]
+    public string Name { get; set; } = string.Empty;
+    
+    [StringLength(500)]
+    public string Description { get; set; } = string.Empty;
+    
+    [Required]
+    [StringLength(200)]
+    public string TriggerCondition { get; set; } = string.Empty;
+    
+    [Required]
+    [StringLength(200)]
+    public string Action { get; set; } = string.Empty;
+    
+    public int Priority { get; set; } = 1;
+    
+    public bool IsActive { get; set; } = true;
+    
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+}

Campaign_Tracker.Server/Seed/Models/ReferenceValue.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace Campaign_Tracker.Server.Seed.Models;
+
+public class ReferenceValue
+{
+    public int Id { get; set; }
+    
+    [Required]
+    [StringLength(100)]
+    public string Name { get; set; } = string.Empty;
+    
+    [StringLength(500)]
+    public string Description { get; set; } = string.Empty;
+    
+    public string Value { get; set; } = string.Empty;
+    
+    public bool IsActive { get; set; } = true;
+    
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+}

Campaign_Tracker.Server/Seed/Models/RequiredFieldRule.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace Campaign_Tracker.Server.Seed.Models;
+
+public class RequiredFieldRule
+{
+    public int Id { get; set; }
+    
+    [Required]
+    [StringLength(100)]
+    public string Name { get; set; } = string.Empty;
+    
+    [StringLength(500)]
+    public string Description { get; set; } = string.Empty;
+    
+    [Required]
+    [StringLength(200)]
+    public string FieldPath { get; set; } = string.Empty;
+    
+    public bool IsRequired { get; set; } = true;
+    
+    public bool IsActive { get; set; } = true;
+    
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+}