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.AbCip.Tests/CipSymbolObjectDecoderTests.cs

@@ -50,6 +50,7 @@ public sealed class CipSymbolObjectDecoderTests
         return result;
     }
 
+    /// <summary>Verifies that a single DInt entry decodes correctly.</summary>
     [Fact]
     public void Single_DInt_entry_decodes_to_scalar_DInt_tag()
     {
@@ -69,6 +70,9 @@ public sealed class CipSymbolObjectDecoderTests
         tags[0].IsSystemTag.ShouldBeFalse();
     }
 
+    /// <summary>Verifies that all known atomic type codes map to correct data types.</summary>
+    /// <param name="typeCode">The CIP type code to map.</param>
+    /// <param name="expected">The expected AbCipDataType result.</param>
     [Theory]
     [InlineData((byte)0xC1, AbCipDataType.Bool)]
     [InlineData((byte)0xC2, AbCipDataType.SInt)]
@@ -87,12 +91,14 @@ public sealed class CipSymbolObjectDecoderTests
         CipSymbolObjectDecoder.MapTypeCode(typeCode).ShouldBe(expected);
     }
 
+    /// <summary>Verifies that unknown type codes return null for opaque handling.</summary>
     [Fact]
     public void Unknown_type_code_returns_null_so_caller_treats_as_opaque()
     {
         CipSymbolObjectDecoder.MapTypeCode(0xFF).ShouldBeNull();
     }
 
+    /// <summary>Verifies that struct flag overrides type code.</summary>
     [Fact]
     public void Struct_flag_overrides_type_code_and_yields_Structure()
     {
@@ -108,6 +114,7 @@ public sealed class CipSymbolObjectDecoderTests
         tag.DataType.ShouldBe(AbCipDataType.Structure);
     }
 
+    /// <summary>Verifies that system flag surfaces as IsSystemTag true.</summary>
     [Fact]
     public void System_flag_surfaces_as_IsSystemTag_true()
     {
@@ -123,6 +130,7 @@ public sealed class CipSymbolObjectDecoderTests
         tag.DataType.ShouldBe(AbCipDataType.DInt);
     }
 
+    /// <summary>Verifies that program scope names split correctly into prefix and name.</summary>
     [Fact]
     public void Program_scope_name_splits_prefix_into_ProgramScope()
     {
@@ -138,6 +146,7 @@ public sealed class CipSymbolObjectDecoderTests
         tag.Name.ShouldBe("StepIndex");
     }
 
+    /// <summary>Verifies that multiple entries decode in wire order with proper padding.</summary>
     [Fact]
     public void Multiple_entries_decode_in_wire_order_with_even_padding()
     {
@@ -154,6 +163,7 @@ public sealed class CipSymbolObjectDecoderTests
         tags[1].DataType.ShouldBe(AbCipDataType.Real);
     }
 
+    /// <summary>Verifies that truncated buffers stop decoding gracefully.</summary>
     [Fact]
     public void Truncated_buffer_stops_decoding_gracefully()
     {
@@ -164,12 +174,17 @@ public sealed class CipSymbolObjectDecoderTests
         CipSymbolObjectDecoder.Decode(truncated).ToList().Count.ShouldBeLessThan(1); // 0 — didn't parse the broken entry
     }
 
+    /// <summary>Verifies that empty buffers yield no tags.</summary>
     [Fact]
     public void Empty_buffer_yields_no_tags()
     {
         CipSymbolObjectDecoder.Decode([]).ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that SplitProgramScope handles all valid name shapes.</summary>
+    /// <param name="input">The name string to split.</param>
+    /// <param name="expectedScope">The expected program scope prefix, if any.</param>
+    /// <param name="expectedName">The expected name after splitting.</param>
     [Theory]
     [InlineData("Counter", null, "Counter")]
     [InlineData("Program:MainProgram.Step", "MainProgram", "Step")]