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.Modbus.Addressing.Tests/ModbusFamilyParserTests.cs

@@ -14,6 +14,9 @@ public sealed class ModbusFamilyParserTests
 {
     // ----- DL205 native: V-memory (octal), Y/C/X/SP coils + discrete -----
 
+    /// <summary>Verifies DL205 user V-memory addresses map to holding registers.</summary>
+    /// <param name="addr">The V-memory address.</param>
+    /// <param name="expectedOffset">The expected holding register offset.</param>
     [Theory]
     [InlineData("V0",     0)]
     [InlineData("V2000",  1024)]   // octal 2000 = decimal 1024
@@ -30,6 +33,9 @@ public sealed class ModbusFamilyParserTests
     // plain octal decode — the CPU relocates the system bank to Modbus PDU 0x2100. Octal-decoding
     // V40400 yields 16640 (0x4100), the WRONG register. Per docs/v2/dl205.md §V-Memory Addressing,
     // V40400 must map to PDU 0x2100 (decimal 8448) and the bank is contiguous from there.
+    /// <summary>Verifies DL205 system V-memory addresses map to the system bank in holding registers.</summary>
+    /// <param name="addr">The V-memory address.</param>
+    /// <param name="expectedOffset">The expected holding register offset.</param>
     [Theory]
     [InlineData("V40400", 0x2100)]  // system base
     [InlineData("V40401", 0x2101)]  // next register — contiguous, +1 decimal
@@ -42,6 +48,7 @@ public sealed class ModbusFamilyParserTests
         p.DataType.ShouldBe(ModbusDataType.Int16);
     }
 
+    /// <summary>Verifies system V-memory helper correctly routes through system bank.</summary>
     [Fact]
     public void DL205_SystemVMemory_Helper_Routes_Through_SystemBank()
     {
@@ -52,6 +59,7 @@ public sealed class ModbusFamilyParserTests
         DirectLogicAddress.UserVMemoryToPdu("V40400").ShouldBe((ushort)16640); // plain octal decode — user-bank only
     }
 
+    /// <summary>Verifies DL205 Y output addresses map to coils bank.</summary>
     [Fact]
     public void DL205_Y_Output_Maps_To_Coils_Bank()
     {
@@ -61,6 +69,7 @@ public sealed class ModbusFamilyParserTests
         p.DataType.ShouldBe(ModbusDataType.Bool);
     }
 
+    /// <summary>Verifies DL205 C control relay addresses map to coils bank, not Modicon coil.</summary>
     [Fact]
     public void DL205_C_Relay_Maps_To_Coils_Bank_NotModiconCoil()
     {
@@ -71,6 +80,7 @@ public sealed class ModbusFamilyParserTests
         p.Offset.ShouldBe((ushort)(3072 + 64));
     }
 
+    /// <summary>Verifies DL205 X input addresses map to discrete inputs.</summary>
     [Fact]
     public void DL205_X_Input_Maps_To_DiscreteInputs()
     {
@@ -79,6 +89,7 @@ public sealed class ModbusFamilyParserTests
         p.Offset.ShouldBe((ushort)15);  // octal 17 = decimal 15
     }
 
+    /// <summary>Verifies DL205 SP special relay addresses map to discrete inputs.</summary>
     [Fact]
     public void DL205_SP_Special_Relay_Maps_To_DiscreteInputs()
     {
@@ -87,6 +98,7 @@ public sealed class ModbusFamilyParserTests
         p.Offset.ShouldBe((ushort)(1024 + 8));  // SpecialBaseDiscrete + octal(10)
     }
 
+    /// <summary>Verifies DL205 parser falls back to Modicon when native parsing fails.</summary>
     [Fact]
     public void DL205_Falls_Back_To_Modicon_When_Native_Misses()
     {
@@ -99,6 +111,7 @@ public sealed class ModbusFamilyParserTests
 
     // ----- MELSEC native: D / X / Y / M with sub-family-aware X/Y parsing -----
 
+    /// <summary>Verifies MELSEC D register addresses map to holding registers.</summary>
     [Fact]
     public void MELSEC_D_Register_Maps_To_HoldingRegisters()
     {
@@ -107,6 +120,7 @@ public sealed class ModbusFamilyParserTests
         p.Offset.ShouldBe((ushort)100);   // base 0 + decimal 100
     }
 
+    /// <summary>Verifies MELSEC M relay addresses map to coils with decimal format.</summary>
     [Fact]
     public void MELSEC_M_Relay_Maps_To_Coils_Decimal()
     {
@@ -115,6 +129,7 @@ public sealed class ModbusFamilyParserTests
         p.Offset.ShouldBe((ushort)50);
     }
 
+    /// <summary>Verifies MELSEC Q family treats X addresses as hexadecimal.</summary>
     [Fact]
     public void MELSEC_Q_Family_Treats_X20_As_Hex()
     {
@@ -123,6 +138,7 @@ public sealed class ModbusFamilyParserTests
         p.Offset.ShouldBe((ushort)0x20);  // hex 20 = decimal 32
     }
 
+    /// <summary>Verifies MELSEC F family treats X addresses as octal.</summary>
     [Fact]
     public void MELSEC_F_Family_Treats_X20_As_Octal()
     {
@@ -133,6 +149,7 @@ public sealed class ModbusFamilyParserTests
 
     // ----- Cross-family safety / Generic regression -----
 
+    /// <summary>Verifies Generic family does not try DL205 native parsing.</summary>
     [Fact]
     public void Generic_Family_Does_Not_Try_DL205_Branch()
     {
@@ -143,6 +160,7 @@ public sealed class ModbusFamilyParserTests
         error.ShouldNotBeNull();
     }
 
+    /// <summary>Verifies C100 under Generic family means Modicon coil 99.</summary>
     [Fact]
     public void C100_Under_Generic_Means_Modicon_Coil_99()
     {
@@ -153,6 +171,7 @@ public sealed class ModbusFamilyParserTests
         p.Offset.ShouldBe((ushort)99);
     }
 
+    /// <summary>Verifies suffix grammar composes correctly with native addresses.</summary>
     [Fact]
     public void Suffix_Grammar_Composes_With_Native_Address()
     {
@@ -165,6 +184,7 @@ public sealed class ModbusFamilyParserTests
         p.ArrayCount.ShouldBe(5);
     }
 
+    /// <summary>Verifies DL205 bit suffix works on V-memory addresses.</summary>
     [Fact]
     public void DL205_Bit_Suffix_On_VMemory()
     {