docs: backfill XML documentation across 756 files

Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public
members surfaced by commentchecker — resolves 5,847 of 5,869 issues
(99.6%) across three /fixdocs passes.

src/Core/ZB.MOM.WW.OtOpcUa.Core/OpcUa/IdentificationFolderBuilder.cs

@@ -42,7 +42,9 @@ public static class IdentificationFolderBuilder
         "ManufacturerUri", "DeviceManualUri",
     };
 
-    /// <summary>True when the equipment row has at least one non-null Identification field.</summary>
+    /// <summary>Checks whether the equipment row has at least one non-null Identification field.</summary>
+    /// <param name="equipment">The equipment entity.</param>
+    /// <returns>True if any Identification field is non-null; otherwise false.</returns>
     public static bool HasAnyFields(Equipment equipment)
     {
         ArgumentNullException.ThrowIfNull(equipment);
@@ -58,10 +60,12 @@ public static class IdentificationFolderBuilder
     }
 
     /// <summary>
-    ///     Build the Identification sub-folder under <paramref name="equipmentBuilder"/>. No-op
-    ///     when every field is null. Returns the sub-folder builder (or null when no-op) so
-    ///     callers can attach additional nodes underneath if needed.
+    ///     Builds the Identification sub-folder under the given equipment builder. Returns the sub-folder builder
+    ///     (or null when no fields are present) so callers can attach additional nodes if needed.
     /// </summary>
+    /// <param name="equipmentBuilder">The equipment address space builder.</param>
+    /// <param name="equipment">The equipment entity with identification fields.</param>
+    /// <returns>The sub-folder builder, or null if no fields are present.</returns>
     public static IAddressSpaceBuilder? Build(IAddressSpaceBuilder equipmentBuilder, Equipment equipment)
     {
         ArgumentNullException.ThrowIfNull(equipmentBuilder);