* fix: tests and refactoring, add justfile instead of makefile
* chore: add tiberius dependency for MSSQL support
* feat: add Mssql variant to DbType enum and config validation
* feat: add MSSQL domain adapter with tiberius ping and sqlpackage backup/restore
* feat: install sqlpackage in Docker base and prod stages
* feat: add MSSQL service to docker-compose and config examples
* fix: log backup errors instead of silently discarding them
* fix: use dotnet-install.sh instead of Microsoft apt feed (SHA1 key rejected by Debian Trixie)
* fix: add /TrustServerCertificate:true to sqlpackage commands for self-signed certs
* fix: use connection string with TrustServerCertificate for sqlpackage
* fix: use user database in MSSQL config example (system databases cannot be exported)
* feat: add seed-mssql task and seed script
* fix: docker-compose.yml