feat: add lifespan integration and dependency injection

tests/test_app.py

@@ -13,3 +13,35 @@ async def test_app_has_title(client: AsyncClient) -> None:
     assert response.status_code == 200
     data = response.json()
     assert data["info"]["title"] == "FastAPI OIDC OP"
+
+
+async def test_app_has_repos_on_state(client: AsyncClient) -> None:
+    from fastapi_oidc_op.store.protocols import (
+        CredentialRepository,
+        MagicLinkRepository,
+        UserRepository,
+    )
+
+    app = client._transport.app  # type: ignore[union-attr]
+    assert isinstance(app.state.user_repo, UserRepository)
+    assert isinstance(app.state.credential_repo, CredentialRepository)
+    assert isinstance(app.state.magic_link_repo, MagicLinkRepository)
+
+
+async def test_dependency_functions() -> None:
+    from unittest.mock import MagicMock
+
+    from fastapi_oidc_op.dependencies import (
+        get_credential_repo,
+        get_magic_link_repo,
+        get_user_repo,
+    )
+
+    request = MagicMock()
+    request.app.state.user_repo = "user_repo_sentinel"
+    request.app.state.credential_repo = "credential_repo_sentinel"
+    request.app.state.magic_link_repo = "magic_link_repo_sentinel"
+
+    assert get_user_repo(request) == "user_repo_sentinel"
+    assert get_credential_repo(request) == "credential_repo_sentinel"
+    assert get_magic_link_repo(request) == "magic_link_repo_sentinel"