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.OpcUaClient.Tests/OpcUaClientReconnectTests.cs

@@ -11,12 +11,14 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Tests;
 [Trait("Category", "Unit")]
 public sealed class OpcUaClientReconnectTests
 {
+    /// <summary>Verifies that the default reconnect period matches the driver specification of 5 seconds.</summary>
     [Fact]
     public void Default_ReconnectPeriod_matches_driver_specs_5_seconds()
     {
         new OpcUaClientDriverOptions().ReconnectPeriod.ShouldBe(TimeSpan.FromSeconds(5));
     }
 
+    /// <summary>Verifies that reconnect period can be configured for aggressive or relaxed retries.</summary>
     [Fact]
     public void Options_ReconnectPeriod_is_configurable_for_aggressive_or_relaxed_retry()
     {
@@ -24,6 +26,7 @@ public sealed class OpcUaClientReconnectTests
         opts.ReconnectPeriod.ShouldBe(TimeSpan.FromMilliseconds(500));
     }
 
+    /// <summary>Verifies that the driver starts with no reconnect handler active before initialization.</summary>
     [Fact]
     public void Driver_starts_with_no_reconnect_handler_active_pre_init()
     {