feat(db): add MaterialHeader EF entity and DbSet mapping\n\n- Map to dbo.MaterialHeader with key and relevant columns.\n- Register DbSet in PepDB and configure string columns as non-Unicode.

PepLib.Core/Data/MaterialHeader.cs

@@ -0,0 +1,73 @@
+namespace PepLib.Data
+{
+    using System;
+    using System.ComponentModel.DataAnnotations;
+    using System.ComponentModel.DataAnnotations.Schema;
+
+    [Table("MaterialHeader")]
+    public partial class MaterialHeader
+    {
+        [Key]
+        public int ID { get; set; }
+
+        public DateTime? ModifiedDate { get; set; }
+
+        [Required]
+        [StringLength(254)]
+        public string ModifiedBy { get; set; }
+
+        [Required]
+        [StringLength(32)]
+        public string CompanyID { get; set; }
+
+        [Required]
+        [StringLength(32)]
+        public string FacilityID { get; set; }
+
+        [Required]
+        [StringLength(64)]
+        public string GroupID { get; set; }
+
+        // Typically numeric-as-string in PEP data; used as material number in other tables
+        [Required]
+        [StringLength(254)]
+        public string Material { get; set; }
+
+        [Required]
+        [StringLength(254)]
+        public string MatGrade { get; set; }
+
+        public byte AutoAddText { get; set; }
+
+        public double Cost { get; set; }
+
+        [Required]
+        [StringLength(254)]
+        public string Description { get; set; }
+
+        public double Density { get; set; }
+
+        public byte KeepRemnant { get; set; }
+
+        [Required]
+        [StringLength(16)]
+        public string KeepRemnantLogic { get; set; }
+
+        public double Kfactor { get; set; }
+
+        public double MinRemnantArea { get; set; }
+
+        public double MinRemnantCost { get; set; }
+
+        public double MinRemnantSize { get; set; }
+
+        public double MinRemnantWeight { get; set; }
+
+        [Required]
+        [StringLength(254)]
+        public string OriginalMaterialForStack { get; set; }
+
+        public double Thickness { get; set; }
+    }
+}
+