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/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/Phase7Applier.cs

@@ -28,6 +28,9 @@ public sealed class Phase7Applier
     private readonly IOpcUaAddressSpaceSink _sink;
     private readonly ILogger<Phase7Applier> _logger;
 
+    /// <summary>Initializes a new instance of the Phase7Applier class.</summary>
+    /// <param name="sink">The OPC UA address space sink to apply changes to.</param>
+    /// <param name="logger">The logger instance.</param>
     public Phase7Applier(IOpcUaAddressSpaceSink sink, ILogger<Phase7Applier> logger)
     {
         ArgumentNullException.ThrowIfNull(sink);
@@ -40,6 +43,8 @@ public sealed class Phase7Applier
     ///     Apply <paramref name="plan"/> to the sink. Returns a summary of what was applied so
     ///     callers (OpcUaPublishActor) can correlate the work back to the originating deployment.
     /// </summary>
+    /// <param name="plan">The plan to apply.</param>
+    /// <returns>A Phase7ApplyOutcome summarizing the applied changes.</returns>
     public Phase7ApplyOutcome Apply(Phase7Plan plan)
     {
         ArgumentNullException.ThrowIfNull(plan);
@@ -104,6 +109,7 @@ public sealed class Phase7Applier
     ///     Idempotent: each <c>EnsureFolder</c> call returns the existing folder if already
     ///     present, so re-applies are cheap.
     /// </summary>
+    /// <param name="composition">The composition result containing the hierarchy to materialise.</param>
     public void MaterialiseHierarchy(Phase7CompositionResult composition)
     {
         ArgumentNullException.ThrowIfNull(composition);
@@ -136,6 +142,7 @@ public sealed class Phase7Applier
     ///     the Galaxy driver's <c>OnDataChange</c> path fills the value in once SubscribeBulk lands.
     ///     Idempotent.
     /// </summary>
+    /// <param name="composition">The composition result containing the Galaxy tags to materialise.</param>
     public void MaterialiseGalaxyTags(Phase7CompositionResult composition)
     {
         ArgumentNullException.ThrowIfNull(composition);