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/Runtime/StatusCodeMapTests.cs

@@ -14,6 +14,9 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Tests.Runtime;
 /// </summary>
 public sealed class StatusCodeMapTests
 {
+    /// <summary>Verifies that known quality bytes map to the expected OPC UA status codes.</summary>
+    /// <param name="input">The Galaxy quality byte to map.</param>
+    /// <param name="expected">The expected OPC UA status code.</param>
     [Theory]
     [InlineData((byte)192, 0x00000000u)]   // Good
     [InlineData((byte)216, 0x00D80000u)]   // Good_LocalOverride
@@ -35,6 +38,8 @@ public sealed class StatusCodeMapTests
         StatusCodeMap.FromQualityByte(input).ShouldBe(expected);
     }
 
+    /// <summary>Verifies that unknown quality bytes fall back to category bucket status codes.</summary>
+    /// <param name="input">The unknown Galaxy quality byte to categorize.</param>
     [Theory]
     [InlineData((byte)200)]  // Unknown Good — falls back to category bucket
     [InlineData((byte)100)]  // Unknown Uncertain
@@ -53,12 +58,14 @@ public sealed class StatusCodeMapTests
     // would invert the mapping when the worker sets success=1 for an error code (the numeric
     // value is NOT a boolean).
 
+    /// <summary>Verifies that null status maps to Good status code.</summary>
     [Fact]
     public void FromMxStatus_NullStatus_IsGood()
     {
         StatusCodeMap.FromMxStatus(null).ShouldBe(StatusCodeMap.Good);
     }
 
+    /// <summary>Verifies that non-zero success with OK category maps to Good.</summary>
     [Fact]
     public void FromMxStatus_SuccessNonZeroAndCategoryOk_IsGood()
     {
@@ -67,6 +74,7 @@ public sealed class StatusCodeMapTests
         StatusCodeMap.FromMxStatus(s).ShouldBe(StatusCodeMap.Good);
     }
 
+    /// <summary>Verifies that non-zero success with non-OK category does not map to Good.</summary>
     [Fact]
     public void FromMxStatus_SuccessNonZeroButCategoryNotOk_IsNotGood()
     {
@@ -76,6 +84,7 @@ public sealed class StatusCodeMapTests
         StatusCodeMap.FromMxStatus(s).ShouldNotBe(StatusCodeMap.Good);
     }
 
+    /// <summary>Verifies that known detail codes map to their specific status codes.</summary>
     [Fact]
     public void FromMxStatus_SuccessZeroAndCategoryNotOk_DetailKnown_MapsToSpecificCode()
     {
@@ -83,6 +92,7 @@ public sealed class StatusCodeMapTests
         StatusCodeMap.FromMxStatus(s).ShouldBe(StatusCodeMap.BadNotConnected);
     }
 
+    /// <summary>Verifies that non-zero DetectedBy maps to communication error when detail is zero.</summary>
     [Fact]
     public void FromMxStatus_SuccessZero_DetailZero_DetectedByNonZero_IsCommunicationError()
     {
@@ -90,6 +100,7 @@ public sealed class StatusCodeMapTests
         StatusCodeMap.FromMxStatus(s).ShouldBe(StatusCodeMap.BadCommunicationError);
     }
 
+    /// <summary>Verifies that all-zero status maps to Bad status code.</summary>
     [Fact]
     public void FromMxStatus_SuccessZero_AllZero_IsBad()
     {
@@ -97,6 +108,7 @@ public sealed class StatusCodeMapTests
         StatusCodeMap.FromMxStatus(s).ShouldBe(StatusCodeMap.Bad);
     }
 
+    /// <summary>Verifies that top two bits of status codes follow OPC UA convention.</summary>
     [Fact]
     public void TopByteCategoryBits_StayWithinOpcUaConvention()
     {
@@ -115,6 +127,9 @@ public sealed class StatusCodeMapTests
 
     // ===== Driver.Galaxy-004 regression: ToQualityCategoryByte lives next to its inverse =====
 
+    /// <summary>Verifies that status codes extract to their OPC DA category byte equivalent.</summary>
+    /// <param name="statusCode">The OPC UA status code to convert.</param>
+    /// <param name="expected">The expected OPC DA category byte.</param>
     [Theory]
     [InlineData(0x00000000u, (byte)192)]  // Good
     [InlineData(0x00D80000u, (byte)192)]  // GoodLocalOverride — still Good category
@@ -128,6 +143,7 @@ public sealed class StatusCodeMapTests
         StatusCodeMap.ToQualityCategoryByte(statusCode).ShouldBe(expected);
     }
 
+    /// <summary>Verifies that ToQualityCategoryByte is the right inverse of FromQualityByte for category bytes.</summary>
     [Fact]
     public void ToQualityCategoryByte_IsRightInverseOfFromQualityByte_ForCategoryBytes()
     {