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/adapters.py

@@ -17,9 +17,16 @@ def require_runtime():
     checkout until their audited implementations are added.
     """
     environment = os.environ.get('APP_ENV', 'local')
-    for name in ('FREIGHT', 'WHATSAPP'):
-        if os.environ.get(f'{name}_ADAPTER') != 'fake':
-            raise RuntimeError(f'{name} must use the currently supported fake adapter')
+    if os.environ.get('WHATSAPP_ADAPTER') != 'fake':
+        raise RuntimeError('WHATSAPP must use the currently supported fake adapter')
+    freight = os.environ.get('FREIGHT_ADAPTER')
+    if freight == 'jadlog':
+        from .jadlog import required_settings as jadlog_settings
+        for name in jadlog_settings():
+            if not os.environ.get(name):
+                raise RuntimeError(f'{name} is required for the Jadlog adapter')
+    elif freight != 'fake':
+        raise RuntimeError('FREIGHT must use the fake or jadlog adapter')
     tiny = os.environ.get('TINY_ADAPTER')
     if tiny == 'tiny':
         from .tiny import required_settings
@@ -148,12 +155,12 @@ class FakePayment:
                 'status': 'paid', 'total_cents': total_cents}
 
 class FreightAdapter(Protocol):
-    def quote(self, service: str, postal_code: str) -> dict: ...
+    def quote(self, service: str, postal_code: str, metres=None, declared_cents: int = 0) -> dict: ...
 
 class FakeFreight:
     name = 'fake'
 
-    def quote(self, service: str, postal_code: str) -> dict:
+    def quote(self, service: str, postal_code: str, metres=None, declared_cents: int = 0) -> dict:
         if service == 'pickup':
             return {'provider': 'fake', 'service': 'pickup', 'total_cents': 0, 'postal_code': ''}
         if service != 'mock-standard' or len(postal_code) != 8 or not postal_code.isascii() or not postal_code.isdigit():