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/Drivers/ZB.MOM.WW.OtOpcUa.Driver.AbLegacy/AbLegacyStatusMapper.cs

@@ -28,6 +28,8 @@ public static class AbLegacyStatusMapper
     ///     stays correct regardless of how the wrapper renumbers native PLCTAG_ERR_* constants
     ///     in future releases.
     /// </summary>
+    /// <param name="status">The integer status code from libplctag.</param>
+    /// <returns>The corresponding OPC UA status code.</returns>
     public static uint MapLibplctagStatus(int status) => MapLibplctagStatus((Status)status);
 
     /// <summary>
@@ -35,6 +37,8 @@ public static class AbLegacyStatusMapper
     ///     the canonical core; the <c>int</c> overload exists only for the
     ///     <see cref="IAbLegacyTagRuntime.GetStatus"/> seam which boxes the enum as an int.
     /// </summary>
+    /// <param name="status">The libplctag Status enum value.</param>
+    /// <returns>The corresponding OPC UA status code.</returns>
     public static uint MapLibplctagStatus(Status status) => status switch
     {
         Status.Ok => Good,
@@ -59,6 +63,8 @@ public static class AbLegacyStatusMapper
     ///     the raw STS byte, so this method is not wired into the current read/write path.
     ///     It is retained as the reference mapping for future PCCC-STS inspection.
     /// </summary>
+    /// <param name="sts">The PCCC STS byte.</param>
+    /// <returns>The corresponding OPC UA status code.</returns>
     public static uint MapPcccStatus(byte sts) => sts switch
     {
         0x00 => Good,