Merge re/r1.4-gethi-finding: R1.1 ExecuteSqlCommand + R1.4 GetHistorianInfo (bounded)

# Conflicts:
#	docs/plans/hcal-roadmap.md
#	src/AVEVA.Historian.Client/HistorianClient.cs
#	src/AVEVA.Historian.Client/Protocol/Historian2020ProtocolDialect.cs
#	tests/AVEVA.Historian.Client.Tests/HistorianClientIntegrationTests.cs
#	tools/AVEVA.Historian.NativeTraceHarness/Program.cs

src/AVEVA.Historian.Client/HistorianClient.cs

@@ -210,6 +210,22 @@ public sealed class HistorianClient : IAsyncDisposable
     // documented-but-blocked path in HistorianWcfTagWriteOrchestrator and
     // docs/reverse-engineering/wcf-add-tag-extended-properties.md §Delete.
 
+    /// <summary>
+    /// Executes a SQL command against the Historian over the WCF <c>ExeC</c>/<c>GetR</c> ops and
+    /// returns the record set as a <see cref="HistorianSqlResult"/> (the managed equivalent of the
+    /// native <c>DataTable</c>). The record-set path (<see cref="HistorianSqlExecuteOption.ExecuteRecord"/>,
+    /// the default) is the evidence-backed surface; the result is decoded from the server's
+    /// NRBF-serialized DataTable without BinaryFormatter. See <c>HistorianSqlResultProtocol</c>.
+    /// </summary>
+    public Task<HistorianSqlResult> ExecuteSqlCommandAsync(
+        string command,
+        HistorianSqlExecuteOption option = HistorianSqlExecuteOption.ExecuteRecord,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(command);
+        return _protocol.ExecuteSqlCommandAsync(command, option, cancellationToken);
+    }
+
     /// <summary>
     /// Creates or updates the named tag in the Historian Runtime database via
     /// <c>EnsureTags2</c>. Currently only <see cref="HistorianDataType.Float"/> is