feat: prepare postgres sbom cutover

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a028f0-a42f-7582-89a8-ebaad7343834

tests/test_migrations.py

@@ -0,0 +1,38 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from alembic import command
+from alembic.config import Config
+from sqlalchemy import create_engine, inspect
+
+
+def migration_config(database_path: Path) -> Config:
+    config = Config("alembic.ini")
+    config.set_main_option("sqlalchemy.url", f"sqlite:///{database_path}")
+    return config
+
+
+def test_initial_migration_upgrades_and_downgrades(tmp_path: Path) -> None:
+    database_path = tmp_path / "migrated.db"
+    config = migration_config(database_path)
+
+    command.upgrade(config, "head")
+
+    engine = create_engine(f"sqlite:///{database_path}")
+    assert set(inspect(engine).get_table_names()) == {
+        "alembic_version",
+        "entries",
+        "repositories",
+        "snapshots",
+    }
+    assert {index["name"] for index in inspect(engine).get_indexes("entries")} == {
+        "ix_entries_license",
+        "ix_entries_repo",
+        "ix_entries_snapshot",
+    }
+    command.check(config)
+
+    command.downgrade(config, "base")
+
+    assert set(inspect(engine).get_table_names()) == {"alembic_version"}