feat(sql): Odbc provider — ANSI SQL:2008 profile over System.Data.Odbc (lmxopcua#753)

SqlProvider.Odbc is now constructed; every enum member is a working backend.

- OdbcDialect: System.Data.Odbc 10.0.14 (no vulnerable packages), ANSI double-
  quote quoting, positional `?` markers, INFORMATION_SCHEMA catalog (system
  schemas of the common backends excluded by name — the live gate caught
  psqlODBC listing pg_catalog), FETCH FIRST n ROWS ONLY limits, a conservative
  1000-parameter chunk. Positional binding is safe because every caller adds
  parameters in marker order (planner IN list, catalog schema-then-table).
- Named queries on a positional provider are checked by `?` count against the
  declared params (literals/comments ignored), since there is no name to match.
- Supported backends are those whose SQL accepts that profile (PostgreSQL via
  psqlODBC proven, Snowflake-like); SQL Server/MySQL/DB2 should use their native
  provider. The host needs the ODBC driver manager + vendor driver.
- Reserved-provider controls in factory/probe/browser tests now use an
  undeclared ordinal (99); the AdminUI form offers Odbc and a test pins the
  dropdown theory to SqlDialects.Supported.
- Tests: OdbcDialectTests (unit, any host). OdbcReadTests + Docker/odbc/
  run-odbc-gate.sh run the built suite in a throwaway Linux SDK container with
  unixODBC + psqlODBC against a throwaway seeded PostgreSQL: KV IN-list
  positional binding, where-pair, topByTimestamp via FETCH FIRST, a two-
  parameter named query, and the browse walk. macOS has no vendor ODBC driver,
  so there the suite skips.

(lmxopcua#753)

Claude-Session: https://claude.ai/code/session_01GT67AEHd2Acv1YPwGfXEoV

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

@@ -58,10 +58,12 @@ public sealed class SqlDriverBrowserTests
         SqlDriverBrowser.DefaultDialectSelector(SqlProvider.Postgres).ShouldBeOfType<PostgresDialect>();
         SqlDriverBrowser.DefaultDialectSelector(SqlProvider.Oracle).ShouldBeOfType<OracleDialect>();
         SqlDriverBrowser.DefaultDialectSelector(SqlProvider.MySql).ShouldBeOfType<MySqlDialect>();
+        SqlDriverBrowser.DefaultDialectSelector(SqlProvider.Odbc).ShouldBeOfType<OdbcDialect>();
 
-        SqlProvider[] carried = [SqlProvider.SqlServer, SqlProvider.Postgres, SqlProvider.Oracle, SqlProvider.MySql];
-        foreach (var provider in Enum.GetValues<SqlProvider>().Where(p => !carried.Contains(p)))
-            SqlDriverBrowser.DefaultDialectSelector(provider).ShouldBeNull();
+        // Every declared member is carried now; an undeclared ordinal is the control that must stay null.
+        foreach (var provider in Enum.GetValues<SqlProvider>())
+            SqlDriverBrowser.DefaultDialectSelector(provider).ShouldNotBeNull();
+        SqlDriverBrowser.DefaultDialectSelector((SqlProvider)99).ShouldBeNull();
     }
 
     // ---- connection-string reference resolution ----
@@ -189,8 +191,8 @@ public sealed class SqlDriverBrowserTests
     // ---- provider availability ----
 
     /// <summary>
-    ///     The falsifiability control for the widened browse gate: <see cref="SqlProvider.Odbc"/> is still
-    ///     reserved and must be reported as unavailable, naming itself.
+    ///     The falsifiability control for the widened browse gate: an undeclared provider ordinal must be
+    ///     reported as unavailable, naming itself.
     /// </summary>
     [Fact]
     public async Task Open_providerThisBuildDoesNotCarry_saysNotAvailableInThisBuild()
@@ -199,9 +201,9 @@ public sealed class SqlDriverBrowserTests
 
         var ex = await Should.ThrowAsync<InvalidOperationException>(() =>
             browser.OpenAsync(
-                ConfigJson("Odbc", connectionStringRef: "MesStaging"), CancellationToken.None));
+                ConfigJson("99", connectionStringRef: "MesStaging"), CancellationToken.None));
 
-        ex.Message.ShouldContain("Odbc");
+        ex.Message.ShouldContain("99");
         ex.Message.ShouldContain("not available in this build");
     }
 
@@ -217,7 +219,7 @@ public sealed class SqlDriverBrowserTests
 
         var ex = await Should.ThrowAsync<InvalidOperationException>(() =>
             browser.OpenAsync(
-                ConfigJson("Odbc", connectionStringRef: "MesStaging"), CancellationToken.None));
+                ConfigJson("99", connectionStringRef: "MesStaging"), CancellationToken.None));
 
         ex.Message.ShouldContain("not available in this build");
         reads.ShouldBeEmpty();