Task 003: add postgres schema and seed data

apps/backend/tests/integration/test_postgres_alembic_migration.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+import os
+import subprocess
+import sys
+import unittest
+from importlib.util import find_spec
+from pathlib import Path
+
+
+REPO_ROOT = Path(__file__).resolve().parents[4]
+BACKEND_ROOT = REPO_ROOT / "apps" / "backend"
+sys.path.insert(0, str(BACKEND_ROOT))
+
+
+class PostgresAlembicMigrationIntegrationTest(unittest.TestCase):
+    def test_alembic_upgrade_head_creates_schema_on_configured_postgres(self) -> None:
+        dsn = os.environ.get("PIPELINE_TEST_DATABASE_DSN")
+        if not dsn:
+            self.skipTest("PIPELINE_TEST_DATABASE_DSN is not set")
+        if not dsn.startswith(("postgresql://", "postgres://")):
+            self.skipTest("Postgres DSN is required for Alembic migration test")
+        if find_spec("alembic") is None:
+            self.skipTest("alembic is not installed")
+
+        env = os.environ.copy()
+        env["DATABASE_URL"] = dsn
+        subprocess.run(
+            [sys.executable, "-m", "alembic", "upgrade", "head"],
+            cwd=REPO_ROOT,
+            env=env,
+            check=True,
+        )
+
+        from src.domain.schema import CORE_TABLES
+        from src.infrastructure.repositories import open_backend_repository
+
+        repository = open_backend_repository(dsn)
+        self.assertTrue(set(CORE_TABLES).issubset(repository.schema.list_tables()))
+
+
+if __name__ == "__main__":
+    unittest.main()