python3Packages.langgraph-checkpoint-postgres: repair broken update, apply skipBulkUpdate

buildPythonPackage rec {

  pname = "langgraph-checkpoint-postgres";

  version = "2.1.1";

  version = "2.0.23";

  pyproject = true;

  src = fetchFromGitHub {

    owner = "langchain-ai";

    repo = "langgraph";

    tag = "checkpoint==${version}";

    hash = "sha256-UY3AChShKfOrtOQzOm5vi3Yy3rlBc+TAje9L2L6My/U=";

    tag = "checkpointpostgres==${version}";

    hash = "sha256-QAzT8T3bf3R3gwI/iWDYYDz0SxgLZsP61oMk72dYz4s=";

  };

  postgresqlTestSetupPost = ''

  pythonImportsCheck = [ "langgraph.checkpoint.postgres" ];

  passthru.updateScript = gitUpdater {

  passthru = {

    # python updater script sets the wrong tag

    skipBulkUpdate = true;

    updateScript = gitUpdater {

      rev-prefix = "checkpointpostgres==";

    };

  };

  meta = {

    description = "Library with a Postgres implementation of LangGraph checkpoint saver";