"""Routers package — one module per resource (CONTRACT.md §9, BACKEND_BUILD.md §4).

Stage 1 only ships ``system``. Subsequent stages add ``auth``, ``books``,
``query``, ``jobs``, etc. Routers are kept ≤ 150 lines per
BACKEND_BUILD.md §9.1; if one drifts, split it.
"""

__all__: list[str] = []