feat: price home delivery with Jadlog

FREIGHT_ADAPTER=jadlog prices "Receber em casa" through Jadlog's Simulador
de Frete from the order's billed metres and value, adding production days
to Jadlog's delivery time. The package weight is a base plus a weight per
metre from the client, with no default: the adapter refuses to start
without it and without the credentials. The cart re-quotes when the package
changes, and approval quotes again from the server-priced items. The
production stack takes the Jadlog settings, so the read-only probe runs
from the worker's console.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/jadlog_probe.py

@@ -9,6 +9,11 @@ number is required (Jadlog names it in the error), and what the contract
 prices and delivery times are. The first failure stops the run: an account
 problem would repeat on every line.
 
+In production, from the worker's console (Portainer > Containers > worker >
+Console), with JADLOG_TOKEN, JADLOG_CNPJ and JADLOG_CONTA in the stack:
+
+    python -m app.jadlog_probe
+
 Locally, with the credentials in jadlog.env (ignored by git):
 
     docker compose -f compose.local.yaml -f compose.providers.yaml run --rm --no-deps --build \\