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>

tests/test_jadlog.py

@@ -4,11 +4,13 @@ This proves the manual's contract only; app.jadlog_probe must still confirm
 it on the client's account. Runs where httpx is installed.
 """
 import json
+import os
 import unittest
+from unittest import mock
 
 import httpx
 
-from app.jadlog import QUOTE_URL, JadlogError, JadlogQuotes
+from app.jadlog import QUOTE_URL, JadlogError, JadlogFreight, JadlogQuotes
 from app.jadlog_probe import run
 
 CNPJ = '11.222.333/0001-81'
@@ -66,6 +68,44 @@ class JadlogQuoteTest(unittest.TestCase):
             JadlogQuotes(token='tok', cnpj='123')
 
 
+class JadlogFreightTest(unittest.TestCase):
+    WEIGHTS = {'JADLOG_PESO_BASE_KG': '0.2', 'JADLOG_PESO_POR_METRO_KG': '0.15', 'FREIGHT_PRODUCTION_DAYS': '2'}
+
+    def freight(self, handler, **env):
+        with mock.patch.dict(os.environ, {**self.WEIGHTS, **env}):
+            return JadlogFreight(client(handler))
+
+    def test_package_weight_value_and_days(self):
+        seen = []
+
+        def handler(request):
+            seen.append(json.loads(request.content)['frete'][0])
+            return httpx.Response(200, json={'frete': [{'vltotal': 18.4, 'prazo': 3}]})
+
+        quote = self.freight(handler).quote('jadlog', '01310100', '2.8', 6972)
+        # 0.2 kg of packaging plus 0.15 kg for each of the 2.8 billed metres.
+        self.assertEqual((seen[0]['peso'], seen[0]['vldeclarado'], seen[0]['cepdes']), (0.62, 69.72, '01310100'))
+        self.assertEqual((quote['total_cents'], quote['days'], quote['service']), (1840, 5, 'jadlog'))
+
+    def test_pickup_is_free_and_bad_requests_are_refused(self):
+        freight = self.freight(lambda request: httpx.Response(500))
+        self.assertEqual(freight.quote('pickup', '')['total_cents'], 0)
+        for args in (('mock-standard', '01310100', '1'), ('jadlog', '0131', '1'), ('jadlog', '01310100', None)):
+            with self.subTest(args=args), self.assertRaises(ValueError):
+                freight.quote(*args)
+
+    def test_a_jadlog_failure_is_a_clear_refusal(self):
+        freight = self.freight(lambda request: httpx.Response(200, json={'frete': [{}], 'error': {'id': -1, 'descricao': 'CEP destino invalido'}}))
+        with self.assertRaisesRegex(ValueError, 'CEP destino invalido'):
+            freight.quote('jadlog', '01310100', '1', 100)
+
+    def test_the_weight_has_no_default(self):
+        with mock.patch.dict(os.environ, {}, clear=True), self.assertRaises(KeyError):
+            JadlogFreight(client(lambda request: httpx.Response(200)))
+        with self.assertRaises(RuntimeError):
+            self.freight(lambda request: httpx.Response(200), JADLOG_PESO_POR_METRO_KG='0')
+
+
 class JadlogProbeTest(unittest.TestCase):
     def test_bearer_is_tried_once_after_a_401_and_kept(self):
         headers = []