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/Observability/DriverHealthReport.cs

@@ -26,6 +26,7 @@ namespace ZB.MOM.WW.OtOpcUa.Core.Observability;
 public static class DriverHealthReport
 {
     /// <summary>Compute the fleet-wide readiness verdict from per-driver states.</summary>
+    /// <param name="drivers">The list of per-driver health snapshots to aggregate.</param>
     public static ReadinessVerdict Aggregate(IReadOnlyList<DriverHealthSnapshot> drivers)
     {
         ArgumentNullException.ThrowIfNull(drivers);
@@ -52,6 +53,7 @@ public static class DriverHealthReport
     ///     Map a <see cref="ReadinessVerdict"/> to the HTTP status the /readyz endpoint should
     ///     return per the Stream C.1 state matrix.
     /// </summary>
+    /// <param name="verdict">The readiness verdict to map to HTTP status.</param>
     public static int HttpStatus(ReadinessVerdict verdict) => verdict switch
     {
         ReadinessVerdict.Healthy => 200,

src/Core/ZB.MOM.WW.OtOpcUa.Core/Observability/LogContextEnricher.cs

@@ -18,6 +18,10 @@ namespace ZB.MOM.WW.OtOpcUa.Core.Observability;
 public static class LogContextEnricher
 {
     /// <summary>Attach the capability-call property set. Dispose the returned scope to pop.</summary>
+    /// <param name="driverInstanceId">The unique identifier for the driver instance.</param>
+    /// <param name="driverType">The driver type name.</param>
+    /// <param name="capability">The driver capability being invoked.</param>
+    /// <param name="correlationId">The correlation ID for tracing the call.</param>
     public static IDisposable Push(string driverInstanceId, string driverType, DriverCapability capability, string correlationId)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(driverInstanceId);
@@ -41,8 +45,12 @@ public static class LogContextEnricher
     private sealed class CompositeScope : IDisposable
     {
         private readonly IDisposable[] _inner;
+
+        /// <summary>Initializes a new instance of the CompositeScope with the given inner scopes.</summary>
+        /// <param name="inner">The inner scopes to composite and dispose together.</param>
         public CompositeScope(params IDisposable[] inner) => _inner = inner;
 
+        /// <summary>Disposes all inner scopes in reverse order.</summary>
         public void Dispose()
         {
             // Reverse-order disposal matches Serilog's stack semantics.