Test database for BookRegistry and MyFlat sample applications

=== Content (files): ===
1) TEST 2022-11-26.BAK — MSSQL-backup file;
2) TEST 2022-11-26\TEST.mdf — main data-file;
3) TEST 2022-11-26\TEST_log.ldf — database log-file.

Microsoft SQL Server 2017 (140)+
SQL-Server database:
– compatibility level: Microsoft SQL Server 2017 (140);
– collation: Cyrillic_General_CI_AS;
– name: TEST (DB logical names: TEST, TEST_log).
