Demonstrates tinyORM's additive migration, inserts, named-parameter selection,
and primary-key lookup without any external service.
go run ./cmd/tinyorm_demo
go run ./cmd/tinyorm_demo -include-inactive
go run ./cmd/tinyorm_demo -format json
-format json is intended for scripts; the default text format is meant for
interactive exploration. The dataset is in-memory and recreated on each run.