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.Tests/S7DriverCodeReviewFixTests2.cs

@@ -15,6 +15,7 @@ public sealed class S7DriverCodeReviewFixTests2
 {
     // ── Driver.S7-003 — Read/WriteAsync must throw ArgumentNullException, not NRE ─────────
 
+    /// <summary>Verifies that ReadAsync throws ArgumentNullException for null references.</summary>
     [Fact]
     public async Task ReadAsync_with_null_fullReferences_throws_ArgumentNullException()
     {
@@ -26,6 +27,7 @@ public sealed class S7DriverCodeReviewFixTests2
             await drv.ReadAsync(null!, TestContext.Current.CancellationToken));
     }
 
+    /// <summary>Verifies that WriteAsync throws ArgumentNullException for null writes.</summary>
     [Fact]
     public async Task WriteAsync_with_null_writes_throws_ArgumentNullException()
     {
@@ -36,6 +38,7 @@ public sealed class S7DriverCodeReviewFixTests2
 
     // ── Driver.S7-009 — Poll loop must update health on sustained failure ────────────────
 
+    /// <summary>Verifies that the poll loop degrades health when the driver is uninitialized.</summary>
     [Fact]
     public async Task PollLoop_against_uninitialized_driver_degrades_health()
     {
@@ -64,6 +67,7 @@ public sealed class S7DriverCodeReviewFixTests2
         await drv.DisposeAsync();
     }
 
+    /// <summary>Verifies that the poll loop applies capped backoff after consecutive failures.</summary>
     [Fact]
     public async Task PollLoop_applies_capped_backoff_after_consecutive_failures()
     {
@@ -103,6 +107,7 @@ public sealed class S7DriverCodeReviewFixTests2
 
     // ── Driver.S7-010 — Dispose() must not deadlock via sync-over-async ──────────────────
 
+    /// <summary>Verifies that Dispose completes synchronously without sync-over-async.</summary>
     [Fact]
     public void Dispose_completes_synchronously_without_sync_over_async_round_trip()
     {
@@ -120,6 +125,7 @@ public sealed class S7DriverCodeReviewFixTests2
             "Dispose() must teardown directly — see Driver.S7-010");
     }
 
+    /// <summary>Verifies that Dispose is idempotent.</summary>
     [Fact]
     public void Dispose_is_idempotent()
     {
@@ -132,6 +138,8 @@ public sealed class S7DriverCodeReviewFixTests2
 
     // ── Driver.S7-013 — Reject not-yet-implemented S7DataType values at init ─────────────
 
+    /// <summary>Verifies that Initialize rejects not-yet-implemented data types with NotSupportedException.</summary>
+    /// <param name="dt">The S7 data type that is not yet implemented.</param>
     [Theory]
     [InlineData(S7DataType.Int64)]
     [InlineData(S7DataType.UInt64)]
@@ -162,6 +170,9 @@ public sealed class S7DriverCodeReviewFixTests2
         health.State.ShouldBe(DriverState.Faulted);
     }
 
+    /// <summary>Verifies that Initialize accepts implemented data types.</summary>
+    /// <param name="dt">The S7 data type to test.</param>
+    /// <param name="addr">The S7 address string corresponding to the data type.</param>
     [Theory]
     [InlineData(S7DataType.Bool, "DB1.DBX0.0")]
     [InlineData(S7DataType.Byte, "DB1.DBB0")]