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.Scripting/ScriptContext.cs

@@ -40,6 +40,7 @@ public abstract class ScriptContext
     ///     dependency set is required for the change-driven scheduler to subscribe to the
     ///     right upstream tags at load time.
     /// </remarks>
+    /// <param name="path">The literal tag path to read.</param>
     public abstract DataValueSnapshot GetTag(string path);
 
     /// <summary>
@@ -53,6 +54,8 @@ public abstract class ScriptContext
     ///     extractor tracks the write targets so the engine knows what downstream
     ///     subscribers to notify.
     /// </remarks>
+    /// <param name="path">The literal tag path to write to.</param>
+    /// <param name="value">The value to write to the virtual tag.</param>
     public abstract void SetVirtualTag(string path, object? value);
 
     /// <summary>
@@ -75,6 +78,9 @@ public abstract class ScriptContext
     ///     Useful for alarm predicates that shouldn't flicker on small noise. Pure
     ///     function; no side effects.
     /// </summary>
+    /// <param name="current">The current value to check.</param>
+    /// <param name="previous">The previous value to compare against.</param>
+    /// <param name="tolerance">The minimum difference threshold for a change to be detected.</param>
     public static bool Deadband(double current, double previous, double tolerance)
         => Math.Abs(current - previous) > tolerance;
 }