Per-package isolated Postgres schema with migrations. Local benchmark: 12.87s sequential → 4.51s parallel = 2.85x. ADR-0025 status to Implemented. CI uses BDD_SCHEMA_ISOLATION=true.
Co-authored-by: Gabriel Radureau <arcodange@gmail.com>
Co-committed-by: Gabriel Radureau <arcodange@gmail.com>
NewPostgresRepositoryFromDSN factory + BuildSchemaIsolatedDSN helper + integration test proving per-schema isolation works at repo level. Foundation for T12. Wiring into testserver is stage 2/2.
Co-authored-by: Gabriel Radureau <arcodange@gmail.com>
Co-committed-by: Gabriel Radureau <arcodange@gmail.com>