feat: check Tiny products and add a supervised order test

"Testar conexão" now also reads the four configured Tiny products and
requires each to be active. app/tiny_probe.py runs from the worker console
to list products, confirm the configured ids, and create one marked test
order through the worker's own delivery path, proving the duplicate guard
by search before a second delivery. Nothing is sent without --confirmar.

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

app/tiny.py

@@ -223,16 +223,35 @@ def order_payload(payload, contact_id, today=None):
     return pedido
 
 
-def check(auth=None, transport=None):
+def configured_product(orders, mode):
+    """The Tiny product a mode's setting points at, or a reason it cannot be used."""
+    setting = PRODUCT_SETTINGS[mode]
+    value = os.environ.get(setting, '')
+    if not value.isdigit():
+        return None, f'{setting} sem id'
+    found = orders.request('GET', f'/produtos/{value}')
+    if found.get('situacao') != 'A':
+        return found, f"produto {value} não está ativo no Tiny ({found.get('situacao')})"
+    return found, 'ok'
+
+
+def check(auth=None, transport=None, orders=None):
     """Read-only proof that the connection and permissions work: one order and
-    one contact listed, nothing created. Raises TinyNotConnected when there is
-    no usable connection; otherwise reports each read separately."""
-    orders = TinyOrders(auth=auth or TinyAuth(), transport=transport)
+    one contact listed and each configured product found active, nothing
+    created. Raises TinyNotConnected when there is no usable connection;
+    otherwise reports each read separately."""
+    orders = orders or TinyOrders(auth=auth or TinyAuth(), transport=transport)
+
+    def listed(path):
+        orders.request('GET', path, params={'limit': 1})
+        return 'ok'
+
+    reads = [('pedidos', lambda: listed('/pedidos')), ('contatos', lambda: listed('/contatos'))]
+    reads += [(PRODUCTS[mode], lambda mode=mode: configured_product(orders, mode)[1]) for mode in PRODUCT_SETTINGS]
     results = {}
-    for name, path in (('pedidos', '/pedidos'), ('contatos', '/contatos')):
+    for name, read in reads:
         try:
-            orders.request('GET', path, params={'limit': 1})
-            results[name] = 'ok'
+            results[name] = read()
         except TinyNotConnected:
             raise
         except TinyError as exc: