Merge branch '7.0' into 7.1

# Conflicts:
#	Orm/Xtensive.Orm.Firebird/Sql.Drivers.Firebird/DriverFactory.cs
#	Orm/Xtensive.Orm.Firebird/Sql.Drivers.Firebird/v3_0/Extractor.cs
#	Orm/Xtensive.Orm.Firebird/Sql.Drivers.Firebird/v3_0/Translator.cs
#	Orm/Xtensive.Orm.Firebird/Sql.Drivers.Firebird/v3_0/TypeMapper.cs
#	Orm/Xtensive.Orm.Tests.Framework/Orm.config
#	Orm/Xtensive.Orm.Tests/Issues/IssueJira0208_IncorrectUpgradeSequence/UpgradeTest.cs

Author: alex-kulakov

Orm/Xtensive.Orm.Firebird/Sql.Drivers.Firebird/v3_0/Translator.cs

@@ -1,4 +1,4 @@
-// Copyright (C) 2021-2022 Xtensive LLC.
+// Copyright (C) 2025 Xtensive LLC.
 // This code is distributed under MIT license terms.
 // See the License.txt file in the project root for more information.
 

Orm/Xtensive.Orm.Tests.Sql/DriverFactoryTest.cs

@@ -83,9 +83,9 @@ namespace Xtensive.Orm.Tests.Sql
   [TestFixture]
   public class DriverFactoryTest
   {
-    private string provider = TestConnectionInfoProvider.GetProvider();
-    private string url = TestConnectionInfoProvider.GetConnectionUrl();
-    private string connectionString = TestConnectionInfoProvider.GetConnectionString();
+    private readonly string provider = TestConnectionInfoProvider.GetProvider();
+    private readonly string url = TestConnectionInfoProvider.GetConnectionUrl();
+    private readonly string connectionString = TestConnectionInfoProvider.GetConnectionString();
 
     [Test]
     public void ConnectionUrlTest()