Begin implementation of Step 1. Implementation interrupted when I ran out of credits at openrouter. Credits added. Now trying to figure out how to restart the process...

tests/conftest.py

@@ -0,0 +1,22 @@
+"""Shared test fixtures.
+
+Every test gets a fresh in-memory SQLite database so tests are
+isolated, fast, and leave no artifacts on disk.
+"""
+
+import pytest
+from sqlmodel import Session, SQLModel, create_engine
+from sqlmodel.pool import StaticPool
+
+
+@pytest.fixture
+def session():
+    """Provide a clean database session for each test."""
+    engine = create_engine(
+        "sqlite://",
+        connect_args={"check_same_thread": False},
+        poolclass=StaticPool,
+    )
+    SQLModel.metadata.create_all(engine)
+    with Session(engine) as session:
+        yield session