auth: add dependencies and pytest scaffold

containers/clearview/requirements.txt

@@ -8,3 +8,6 @@ requests==2.32.3
 cryptography==44.0.2
 msal==1.32.0
 openpyxl==3.1.5
+argon2-cffi==23.1.0
+pytest==8.3.3
+httpx==0.27.2

containers/clearview/src/clearview_app/auth/__init__.py

@@ -0,0 +1 @@
+"""Authentication, session, and user-management subsystem."""

containers/clearview/tests/conftest.py

@@ -0,0 +1,51 @@
+"""Pytest fixtures for Clearview tests.
+
+Uses an in-memory SQLite database. Schema is created from the SQLAlchemy
+metadata directly (the Alembic migrations target Postgres types like JSONB).
+"""
+from __future__ import annotations
+
+import os
+import sys
+from pathlib import Path
+
+import pytest
+from sqlalchemy import create_engine, event
+from sqlalchemy.orm import sessionmaker
+
+SRC = Path(__file__).resolve().parents[1] / "src"
+sys.path.insert(0, str(SRC))
+
+os.environ.setdefault("DATABASE_URL", "sqlite+pysqlite:///:memory:")
+os.environ.setdefault("COOKIE_SECURE", "false")
+
+
+@pytest.fixture()
+def db_engine():
+    engine = create_engine(
+        "sqlite+pysqlite:///:memory:",
+        connect_args={"check_same_thread": False},
+        future=True,
+    )
+
+    @event.listens_for(engine, "connect")
+    def _fk_on(dbapi_conn, _):
+        cur = dbapi_conn.cursor()
+        cur.execute("PRAGMA foreign_keys=ON")
+        cur.close()
+
+    from clearview_app.auth.models import Base as AuthBase
+
+    AuthBase.metadata.create_all(engine)
+    yield engine
+    engine.dispose()
+
+
+@pytest.fixture()
+def db_session(db_engine):
+    Session = sessionmaker(bind=db_engine, autoflush=False, autocommit=False, future=True)
+    s = Session()
+    try:
+        yield s
+    finally:
+        s.close()