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.Configuration/Entities/ExternalIdReservation.cs

@@ -9,10 +9,13 @@ namespace ZB.MOM.WW.OtOpcUa.Configuration.Entities;
 /// </summary>
 public sealed class ExternalIdReservation
 {
+    /// <summary>Gets or sets the unique reservation identifier.</summary>
     public Guid ReservationId { get; set; }
 
+    /// <summary>Gets or sets the kind of reservation (ZTag or SAPID).</summary>
     public required ReservationKind Kind { get; set; }
 
+    /// <summary>Gets or sets the reserved external ID value.</summary>
     public required string Value { get; set; }
 
     /// <summary>The equipment that owns this reservation. Stays bound even when equipment is disabled.</summary>
@@ -21,16 +24,21 @@ public sealed class ExternalIdReservation
     /// <summary>First cluster to publish this reservation.</summary>
     public required string ClusterId { get; set; }
 
+    /// <summary>Gets or sets the timestamp when the reservation was first published.</summary>
     public DateTime FirstPublishedAt { get; set; } = DateTime.UtcNow;
 
+    /// <summary>Gets or sets the identifier of the user or system that first published the reservation.</summary>
     public required string FirstPublishedBy { get; set; }
 
+    /// <summary>Gets or sets the timestamp of the most recent publication.</summary>
     public DateTime LastPublishedAt { get; set; } = DateTime.UtcNow;
 
     /// <summary>Non-null when explicitly released by FleetAdmin (audit-logged, requires reason).</summary>
     public DateTime? ReleasedAt { get; set; }
 
+    /// <summary>Gets or sets the identifier of the user or system that released the reservation.</summary>
     public string? ReleasedBy { get; set; }
 
+    /// <summary>Gets or sets the reason for releasing the reservation.</summary>
     public string? ReleaseReason { get; set; }
 }