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.Galaxy.Tests/GalaxyDriverApiKeyResolverTests.cs

@@ -12,12 +12,14 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Tests;
 /// </summary>
 public sealed class GalaxyDriverApiKeyResolverTests
 {
+    /// <summary>Verifies that a literal string is returned unchanged.</summary>
     [Fact]
     public void Literal_string_is_returned_unchanged()
     {
         GalaxyDriver.ResolveApiKey("plain-text-key").ShouldBe("plain-text-key");
     }
 
+    /// <summary>Verifies that env: prefix resolves to an environment variable.</summary>
     [Fact]
     public void Env_prefix_resolves_to_environment_variable()
     {
@@ -33,6 +35,7 @@ public sealed class GalaxyDriverApiKeyResolverTests
         }
     }
 
+    /// <summary>Verifies that unset environment variables throw with a descriptive message.</summary>
     [Fact]
     public void Env_prefix_unset_variable_throws_with_descriptive_message()
     {
@@ -45,6 +48,7 @@ public sealed class GalaxyDriverApiKeyResolverTests
         ex.Message.ShouldContain("unset");
     }
 
+    /// <summary>Verifies that file: prefix resolves to trimmed file contents.</summary>
     [Fact]
     public void File_prefix_resolves_to_trimmed_file_contents()
     {
@@ -60,6 +64,7 @@ public sealed class GalaxyDriverApiKeyResolverTests
         }
     }
 
+    /// <summary>Verifies that file: prefix with missing path throws.</summary>
     [Fact]
     public void File_prefix_missing_path_throws()
     {
@@ -72,6 +77,7 @@ public sealed class GalaxyDriverApiKeyResolverTests
 
     // ===== Driver.Galaxy-010 regression: literal arm warns + dev: prefix path =====
 
+    /// <summary>Verifies that literal strings emit a warning when a logger is supplied.</summary>
     [Fact]
     public void Literal_string_emits_warning_when_logger_supplied()
     {
@@ -86,6 +92,7 @@ public sealed class GalaxyDriverApiKeyResolverTests
             e.Level == LogLevel.Warning && e.Message.Contains("literal", StringComparison.OrdinalIgnoreCase));
     }
 
+    /// <summary>Verifies that dev: prefix returns literal text without emitting warnings.</summary>
     [Fact]
     public void Dev_prefix_returns_literal_without_warning()
     {
@@ -99,6 +106,7 @@ public sealed class GalaxyDriverApiKeyResolverTests
         logger.Entries.ShouldNotContain(e => e.Level == LogLevel.Warning);
     }
 
+    /// <summary>Verifies that env: prefix does not emit literal string warnings.</summary>
     [Fact]
     public void Env_prefix_does_not_emit_literal_warning()
     {
@@ -116,15 +124,24 @@ public sealed class GalaxyDriverApiKeyResolverTests
         }
     }
 
+    /// <summary>A test logger that captures log entries for verification.</summary>
     private sealed class CaptureLogger : ILogger
     {
+        /// <summary>Gets the list of captured log entries with their levels and messages.</summary>
         public List<(LogLevel Level, string Message)> Entries { get; } = new();
+
+        /// <inheritdoc />
         public IDisposable? BeginScope<TState>(TState state) where TState : notnull => null;
+
+        /// <inheritdoc />
         public bool IsEnabled(LogLevel logLevel) => true;
+
+        /// <inheritdoc />
         public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception, Func<TState, Exception?, string> formatter)
             => Entries.Add((logLevel, formatter(state, exception)));
     }
 
+    /// <summary>Verifies that file: prefix with empty file throws.</summary>
     [Fact]
     public void File_prefix_empty_file_throws()
     {