Add remarks to Company regex

src/framework/Framework.Models/ValidationExpressions.cs

@@ -24,6 +24,16 @@ public static class ValidationExpressions
     public const string Name = @"^.+$";
     public const string Bpn = @"^(BPNL|bpnl)[\w|\d]{12}$";
     public const string Bpns = @"^(BPNS|bpns)[\w|\d]{12}$";
+    /// <summary>
+    /// Regular expression pattern for validating legal company names.
+    /// </summary>
+    /// <remarks>
+    /// The pattern ensures the following:
+    /// - unicode category \p{L} for letters, \u0E00-\u0E7F for Thai characters
+    /// - digits, currency symbols, and various special characters.
+    /// - The string can have spaces between characters but not at the end.
+    /// - The length of the string must be between 1 and 160 characters.
+    /// </remarks>
     public const string Company = @"^(?!.*\s$)([\p{L}\u0E00-\u0E7F\d\p{Sc}@%*+_\-/\\,.:;=<>!?&^#'\x22()[\]]\s?){1,160}$";
     public const string ExternalCertificateNumber = @"^[a-zA-Z0-9]{0,36}$";
 }