Adds an @app.on_event('startup') hook that imports routes._wire.
This means lab_api.py needs zero changes — the routers self-register
when the app boots. Drop this file into the repo root and it works.
Alternatively, add to lab_api.py after app creation:
from routes import _autoload # noqa
Called via `import routes._wire` at the bottom of lab_api.py (after all
symbols are defined). Registers every shared object into routes.shared
and mounts all five APIRouters onto the FastAPI app.
Batch 6/6 — final wiring step.
KoalaTrapLord