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.

tests/Core/ZB.MOM.WW.OtOpcUa.Core.Scripting.Tests/FakeScriptContext.cs

@@ -13,12 +13,19 @@ namespace ZB.MOM.WW.OtOpcUa.Core.Scripting.Tests;
 /// </summary>
 public sealed class FakeScriptContext : ScriptContext
 {
+    /// <summary>Gets the dictionary of tags available in this context.</summary>
     public Dictionary<string, DataValueSnapshot> Tags { get; } = new(StringComparer.Ordinal);
+
+    /// <summary>Gets the log of virtual tag write operations.</summary>
     public List<(string Path, object? Value)> Writes { get; } = [];
 
+    /// <inheritdoc />
     public override DateTime Now { get; } = new DateTime(2026, 1, 1, 12, 0, 0, DateTimeKind.Utc);
+
+    /// <inheritdoc />
     public override ILogger Logger { get; } = new LoggerConfiguration().CreateLogger();
 
+    /// <inheritdoc />
     public override DataValueSnapshot GetTag(string path)
     {
         return Tags.TryGetValue(path, out var v)
@@ -26,11 +33,18 @@ public sealed class FakeScriptContext : ScriptContext
             : new DataValueSnapshot(null, 0x80340000u, null, Now); // BadNodeIdUnknown
     }
 
+    /// <inheritdoc />
     public override void SetVirtualTag(string path, object? value)
     {
         Writes.Add((path, value));
     }
 
+    /// <summary>Seeds the context with a tag value for testing.</summary>
+    /// <param name="path">The tag path.</param>
+    /// <param name="value">The tag value.</param>
+    /// <param name="statusCode">The OPC UA status code (default: 0).</param>
+    /// <param name="sourceTs">The source timestamp (default: <see cref="Now"/>).</param>
+    /// <returns>This instance for method chaining.</returns>
     public FakeScriptContext Seed(string path, object? value,
         uint statusCode = 0u, DateTime? sourceTs = null)
     {