refactor(sql): dialect-owned parameter markers, bind names and command configuration

ISqlDialect gains ParameterMarker (the token in the SQL text), ParameterBindName
(the DbParameter.ParameterName) and ConfigureCommand (per-command provider setup,
where Oracle will set BindByName). SQL Server and the test SQLite dialect answer
"@"+name for both spellings and no-op the hook, so SQL Server behaviour is
byte-identical — every existing expected-SQL assertion passes untouched.

SqlGroupPlanner drops its hardcoded @k/@w consts and mints base names (k0..kN, w)
that the dialect spells; SqlQueryPlan carries the emitted markers AND the matching
bind names, so SqlPollReader keeps copying the plan's pairing rather than
re-deriving a provider convention (the two diverge on ODP.NET: ":k0" in the text,
bare "k0" on the parameter). SqlCatalogLoader and SqlBrowseSession bind
schema/table through the dialect, so their bind names cannot drift from the
markers in the dialect-owned catalog SQL. Every parameter-carrying command site
calls ConfigureCommand before its first parameter.

Controlled by a new test-only ColonMarkerDialect (":name" markers, bare bind
names) that really executes against the SQLite fixture. Each leg was falsified
against the pre-change behaviour: the planner emitted "@k0", the reader bound
":k0", and a hardcoded "@schema" in the loader failed catalog load outright.

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Sql.Tests/SqlQueryPlanImmutabilityTests.cs

@@ -12,6 +12,7 @@ public class SqlQueryPlanImmutabilityTests
     public void Plan_doesNotAliasTheCallersLists()
     {
         var names = new List<string> { "@k0" };
+        var bindNames = new List<string> { "@k0" };
         var values = new List<object?> { "v" };
         var members = new List<SqlTagDefinition>
         {
@@ -19,14 +20,17 @@ public class SqlQueryPlanImmutabilityTests
         };
         var selected = new List<string> { "k", "c" };
 
-        var plan = new SqlQueryPlan(SqlTagModel.KeyValue, "gk", "SELECT 1", names, values, members, selected);
+        var plan = new SqlQueryPlan(
+            SqlTagModel.KeyValue, "gk", "SELECT 1", names, bindNames, values, members, selected);
 
         names.Add("@k1");
+        bindNames.Add("@k1");
         values.Add("other");
         members.Add(members[0]);
         selected.Add("extra");
 
         plan.ParameterNames.Count.ShouldBe(1);
+        plan.ParameterBindNames.Count.ShouldBe(1);
         plan.Parameters.Count.ShouldBe(1);
         plan.Members.Count.ShouldBe(1);
         plan.SelectedColumns.Count.ShouldBe(2);