gtiandClaude Opus 5.5
a11209d123
0001 called Base.metadata.create_all(), building the schema from the current models, so on a fresh PostgreSQL 0002 collided on datasets.raw_sha256 and `alembic upgrade head` could never run from zero. 0001 is now an explicit, frozen baseline: the seven base tables exactly as the real history created them, before 0002/0006 extended them. Databases already past 0001 never re-run it. Proof: a fresh `upgrade head` produces a schema identical (pg_dump --schema-only) to the long-lived dev database. 0019 repairs a latent bug found by that comparison: 0006 used server_default="now()" as a string, which PostgreSQL froze at the instant the column was created, so every Agent and Job got the same created_at. It also adds three indexes the models declare but no migration created. central/tests/test_migration_baseline.py guards (via AST) against migrations importing the models or using string timestamp defaults. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>