Major rewrite

SoilMoistureAPI/Models/SoilMoisture.cs

@@ -0,0 +1,24 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace SoilMoistureAPI.Models
+{
+    public class SoilMoisture
+    {
+        [Key]
+        public int Id { get; set; }
+
+        [Required]
+        [ForeignKey("Device")]
+        public string DeviceId { get; set; } // Foreign Key
+
+        [Required]
+        public float MoistureLevel { get; set; }
+
+        public DateTime Timestamp { get; set; } = DateTime.UtcNow;
+
+        // Navigation Property
+        public Device Device { get; set; }
+    }
+}