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.

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.S7.IntegrationTests/Snap7ServerFixture.cs

@@ -40,10 +40,16 @@ public sealed class Snap7ServerFixture : IAsyncDisposable
     private const string DefaultEndpoint = "10.100.0.35:1102";
     private const string EndpointEnvVar = "S7_SIM_ENDPOINT";
 
+    /// <summary>Gets the S7 server hostname or IP address.</summary>
     public string Host { get; }
+
+    /// <summary>Gets the S7 server port number.</summary>
     public int Port { get; }
+
+    /// <summary>Gets the skip reason if the server is unavailable; otherwise null.</summary>
     public string? SkipReason { get; }
 
+    /// <summary>Initializes a new instance of the Snap7ServerFixture class and probes connectivity.</summary>
     public Snap7ServerFixture()
     {
         var raw = Environment.GetEnvironmentVariable(EndpointEnvVar) ?? DefaultEndpoint;
@@ -75,6 +81,7 @@ public sealed class Snap7ServerFixture : IAsyncDisposable
         }
     }
 
+    /// <summary>Disposes the fixture asynchronously.</summary>
     public ValueTask DisposeAsync() => ValueTask.CompletedTask;
 }