docs: complete XML doc comments via fixdocs (2757 to 131 findings)

Add missing <returns>/<param>/<summary>/<typeparam> tags and clean up
misused inheritdoc across 481 files so the documented API surface is
complete. Documentation-only (zero code lines changed). The 131 remaining
findings are inheritdoc-style warnings deliberately left to preserve
hand-written implementation rationale (plan-decision notes, race-condition
explanations).

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.AbLegacy.Tests/AbLegacyLoggerInjectionTests.cs

@@ -19,13 +19,24 @@ public sealed class AbLegacyLoggerInjectionTests
     {
         public readonly List<(LogLevel Level, string Message)> Entries = new();
 
-        /// <inheritdoc />
+        /// <summary>Begins a logical operation scope (returns a no-op scope).</summary>
+        /// <typeparam name="TState">The type of the state to associate with the scope.</typeparam>
+        /// <param name="state">The state identifier for the scope.</param>
+        /// <returns>A no-op disposable scope.</returns>
         public IDisposable BeginScope<TState>(TState state) where TState : notnull => NullScope.Instance;
 
-        /// <inheritdoc />
+        /// <summary>Checks whether logging is enabled for the given level (always true).</summary>
+        /// <param name="logLevel">The log level to check.</param>
+        /// <returns><see langword="true"/> always.</returns>
         public bool IsEnabled(LogLevel logLevel) => true;
 
-        /// <inheritdoc />
+        /// <summary>Records a log entry into the captured entries list.</summary>
+        /// <typeparam name="TState">The type of the log state object.</typeparam>
+        /// <param name="logLevel">The severity level of the log entry.</param>
+        /// <param name="eventId">The event identifier for the log entry.</param>
+        /// <param name="state">The state object associated with the log entry.</param>
+        /// <param name="exception">An optional exception to log.</param>
+        /// <param name="formatter">A function that formats the state and exception into a message string.</param>
         public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception,
             Func<TState, Exception?, string> formatter)
             => Entries.Add((logLevel, formatter(state, exception)));
@@ -33,7 +44,7 @@ public sealed class AbLegacyLoggerInjectionTests
         {
             public static readonly NullScope Instance = new();
 
-            /// <inheritdoc />
+            /// <summary>Disposes the no-op scope (no-op).</summary>
             public void Dispose() { }
         }
     }
@@ -50,6 +61,7 @@ public sealed class AbLegacyLoggerInjectionTests
     }
 
     /// <summary>Verifies that driver initialization failure emits an error log.</summary>
+    /// <returns>A task that represents the asynchronous test operation.</returns>
     [Fact]
     public async Task InitializeAsync_failure_emits_error_log()
     {
@@ -68,6 +80,7 @@ public sealed class AbLegacyLoggerInjectionTests
     }
 
     /// <summary>Verifies that the first non-zero libplctag status per device is logged.</summary>
+    /// <returns>A task that represents the asynchronous test operation.</returns>
     [Fact]
     public async Task First_nonzero_libplctag_status_per_device_is_logged()
     {