Initial commit: mini-erp (backend FastAPI + frontend React/Vite)

Base para el flujo de ramas por cliente.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

mini-backend/routers/batch.py

@@ -0,0 +1,8 @@
+from core.crud_router import make_crud_router
+
+router = make_crud_router(
+    "BatchNumberDetails",
+    tags=["Lotes"],
+    supports_orderby=True,
+    supports_create=False,
+)