first commit

Models/UnlinkedDeviceEnrollment.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Fitness_core_BE.Models
+{
+    // A fingerprint enrolled directly on the physical access-control terminal (by gym
+    // staff, outside our system) that has no matching CustomerAccess yet. Surfaced by
+    // attendance ingestion (AgentService.IngestAttendanceAsync) whenever an incoming
+    // employeeNo/DeviceUserId has no CustomerAccess mapping for that device, so the
+    // client portal can offer it in a dropdown to link to a system Customer.
+    public class UnlinkedDeviceEnrollment
+    {
+        [Key]
+        public Guid Id { get; set; }
+
+        public Guid FKDeviceId { get; set; }
+        [ForeignKey("FKDeviceId")]
+        public virtual AccessDevice AccessDevice { get; set; }
+
+        public int DeviceUserId { get; set; }
+        [MaxLength(32)]
+        public string DeviceEmployeeNo { get; set; } = string.Empty;
+        public string? DeviceReportedName { get; set; }
+        [MaxLength(20)]
+        public string? DeviceUserType { get; set; }
+        public int FingerprintCount { get; set; }
+
+        public DateTime DiscoveredAt { get; set; } = DateTime.UtcNow;
+        public DateTime LastSeenAt { get; set; } = DateTime.UtcNow;
+        public DateTime? LinkedAt { get; set; }
+
+        public long? FKAccessProfileId { get; set; }
+        [ForeignKey(nameof(FKAccessProfileId))]
+        public virtual AccessProfile? AccessProfile { get; set; }
+    }
+}