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/Phase7Plan.cs

@@ -26,6 +26,7 @@ public sealed record Phase7Plan(
     IReadOnlyList<GalaxyTagPlan> RemovedGalaxyTags,
     IReadOnlyList<Phase7Plan.GalaxyTagDelta> ChangedGalaxyTags)
 {
+    /// <summary>Gets a value indicating whether the composition plan contains no changes.</summary>
     public bool IsEmpty =>
         AddedEquipment.Count == 0 && RemovedEquipment.Count == 0 && ChangedEquipment.Count == 0 &&
         AddedDrivers.Count == 0 && RemovedDrivers.Count == 0 && ChangedDrivers.Count == 0 &&
@@ -46,6 +47,8 @@ public static class Phase7Planner
     ///     Element equality on the projection records doubles as the "did this change" check,
     ///     so any field difference moves an item from "stable" to ChangedX.
     /// </summary>
+    /// <param name="previous">The previous composition result.</param>
+    /// <param name="next">The new composition result.</param>
     public static Phase7Plan Compute(Phase7CompositionResult previous, Phase7CompositionResult next)
     {
         ArgumentNullException.ThrowIfNull(previous);