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.AbLegacy.Tests/AbLegacyBitIndexRangeTests.cs

@@ -13,6 +13,8 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.AbLegacy.Tests;
 [Trait("Category", "Unit")]
 public sealed class AbLegacyBitIndexRangeTests
 {
+    /// <summary>Verifies that bit index 0 to 15 is accepted on 16-bit files.</summary>
+    /// <param name="input">The PCCC address string to test.</param>
     [Theory]
     [InlineData("N7:0/15")]
     [InlineData("B3:0/15")]
@@ -23,6 +25,8 @@ public sealed class AbLegacyBitIndexRangeTests
     public void Bit_index_0_to_15_accepted_on_16bit_files(string input) =>
         AbLegacyAddress.TryParse(input).ShouldNotBeNull();
 
+    /// <summary>Verifies that bit index above 15 is rejected on 16-bit files.</summary>
+    /// <param name="input">The PCCC address string to test.</param>
     [Theory]
     [InlineData("N7:0/16")]   // first bit past a 16-bit word
     [InlineData("N7:0/20")]
@@ -35,6 +39,8 @@ public sealed class AbLegacyBitIndexRangeTests
     public void Bit_index_above_15_rejected_on_16bit_files(string input) =>
         AbLegacyAddress.TryParse(input).ShouldBeNull();
 
+    /// <summary>Verifies that bit index 0 to 31 is accepted on L file.</summary>
+    /// <param name="input">The PCCC address string to test.</param>
     [Theory]
     [InlineData("L9:0/0")]
     [InlineData("L9:0/15")]
@@ -43,20 +49,25 @@ public sealed class AbLegacyBitIndexRangeTests
     public void Bit_index_0_to_31_accepted_on_L_file(string input) =>
         AbLegacyAddress.TryParse(input).ShouldNotBeNull();
 
+    /// <summary>Verifies that bit index above 31 is rejected on L file.</summary>
     [Fact]
     public void Bit_index_above_31_rejected_on_L_file() =>
         AbLegacyAddress.TryParse("L9:0/32").ShouldBeNull();
 
+    /// <summary>Verifies that bit index is rejected on float file.</summary>
+    /// <param name="input">The PCCC address string to test.</param>
     [Theory]
     [InlineData("F8:0/0")]    // float files are not bit-addressable at all
     [InlineData("F8:0/3")]
     public void Bit_index_rejected_on_float_file(string input) =>
         AbLegacyAddress.TryParse(input).ShouldBeNull();
 
+    /// <summary>Verifies that negative bit index is still rejected.</summary>
     [Fact]
     public void Negative_bit_index_still_rejected() =>
         AbLegacyAddress.TryParse("N7:0/-1").ShouldBeNull();
 
+    /// <summary>Verifies that bit in word RMW against L file uses 32-bit parent and high bit.</summary>
     [Fact]
     public async Task Bit_in_word_RMW_against_L_file_uses_32bit_parent_and_high_bit()
     {
@@ -81,6 +92,7 @@ public sealed class AbLegacyBitIndexRangeTests
         Convert.ToInt32(factory.Tags["L9:0"].Value).ShouldBe(1 << 20);
     }
 
+    /// <summary>Verifies that bit in word RMW high bit 15 does not corrupt via sign extension.</summary>
     [Fact]
     public async Task Bit_in_word_RMW_high_bit_15_does_not_corrupt_via_sign_extension()
     {