Add Alembic migration foundation

tests/conftest.py

@@ -6,6 +6,7 @@ from sqlalchemy.orm import Session
 
 from app.db import SessionLocal, configure_database
 from app.main import create_app
+from app.migrate import run_migrations
 
 
 @pytest.fixture
@@ -13,6 +14,9 @@ def client(tmp_path: Path):
     test_db_path = tmp_path / "test.db"
     database_url = f"sqlite:///{test_db_path}"
 
+    # Run migration first so DB is at head before app starts.
+    run_migrations(database_url)
+
     configure_database(database_url)
     app = create_app()