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.S7.IntegrationTests/S7_1500/S7_1500Profile.cs

@@ -27,6 +27,9 @@ public static class S7_1500Profile
 
     public const string WriteScratchTag = "WriteScratch";
 
+    /// <summary>Builds the S7 driver options for the S7-1500 integration tests.</summary>
+    /// <param name="host">The hostname or IP address of the S7 PLC.</param>
+    /// <param name="port">The port number for the S7 PLC connection.</param>
     public static S7DriverOptions BuildOptions(string host, int port) => new()
     {
         Host = host,

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.S7.IntegrationTests/S7_1500/S7_1500SmokeTests.cs

@@ -17,6 +17,7 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.S7.IntegrationTests.S7_1500;
 [Trait("Device", "S7_1500")]
 public sealed class S7_1500SmokeTests(Snap7ServerFixture sim)
 {
+    /// <summary>Verifies that the driver reads a seeded u16 value through real S7comm.</summary>
     [Fact]
     public async Task Driver_reads_seeded_u16_through_real_S7comm()
     {
@@ -34,6 +35,7 @@ public sealed class S7_1500SmokeTests(Snap7ServerFixture sim)
         Convert.ToInt32(snapshots[0].Value).ShouldBe(S7_1500Profile.ProbeSeedValue);
     }
 
+    /// <summary>Verifies that the driver reads a typed batch of seeded values.</summary>
     [Fact]
     public async Task Driver_reads_seeded_typed_batch()
     {
@@ -57,6 +59,7 @@ public sealed class S7_1500SmokeTests(Snap7ServerFixture sim)
         Convert.ToBoolean(snapshots[3].Value).ShouldBeTrue();
     }
 
+    /// <summary>Verifies that the driver can write and then read back a value on a scratch register.</summary>
     [Fact]
     public async Task Driver_write_then_read_round_trip_on_scratch_word()
     {

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.S7.IntegrationTests/Snap7ServerFixture.cs

@@ -40,10 +40,16 @@ public sealed class Snap7ServerFixture : IAsyncDisposable
     private const string DefaultEndpoint = "10.100.0.35:1102";
     private const string EndpointEnvVar = "S7_SIM_ENDPOINT";
 
+    /// <summary>Gets the S7 server hostname or IP address.</summary>
     public string Host { get; }
+
+    /// <summary>Gets the S7 server port number.</summary>
     public int Port { get; }
+
+    /// <summary>Gets the skip reason if the server is unavailable; otherwise null.</summary>
     public string? SkipReason { get; }
 
+    /// <summary>Initializes a new instance of the Snap7ServerFixture class and probes connectivity.</summary>
     public Snap7ServerFixture()
     {
         var raw = Environment.GetEnvironmentVariable(EndpointEnvVar) ?? DefaultEndpoint;
@@ -75,6 +81,7 @@ public sealed class Snap7ServerFixture : IAsyncDisposable
         }
     }
 
+    /// <summary>Disposes the fixture asynchronously.</summary>
     public ValueTask DisposeAsync() => ValueTask.CompletedTask;
 }