Eliminar payment + waiting (legacy): el bot toma pedidos, no cobra

El bot conversacional no maneja pagos. Su trabajo: pedidos, datos de
entrega, dejar la orden anotada en Woo (status=pending). El cobro lo
gestiona el comercio offline. Todo lo de payment_type / is_paid /
PAYMENT / WAITING_WEBHOOKS era legacy de un flow viejo que se baja.

Nuevo flow: IDLE → CART → SHIPPING → IDLE (con orden creada).
Cuando el usuario completa shipping (pickup elegido OR delivery+address),
shipping.js emite create_order y el bot cierra con order.confirmed.

- fsm.js: 4 estados (IDLE/CART/SHIPPING/AWAITING_HUMAN). hasPaymentInfo
  e isPaid eliminados. deriveNextState gira SHIPPING→IDLE en vez de
  →PAYMENT→WAITING. ALLOWED transitions actualizadas.
- orderModel.js: createEmptyOrder() sin payment_type/is_paid.
  migrateOldContext deja de leer payment_method / mp.payment_status.
- stateHandlers: payment.js y waiting.js eliminados. shipping.js gana
  finalizeOrder() que emite create_order action y vuelve a IDLE.
- replyTemplates: payment.* y waiting.* fuera. order.confirmed nuevo,
  con 3 variantes y rewriter habilitado.
- NLU openai.js + nlu/schemas.js: select_payment fuera del enum, payment_method
  fuera de entities. Prompt sin la regla de SELECCIONAR PAGO.
- nlu/router.js + nlu/index.js: dominio "payment" eliminado.
  shouldSkipRouter ya no chequea PAYMENT.
- nlu/specialists/payment.js: eliminado.
- promptsRepo.js + promptLoader.js: PROMPT_KEYS sin "payment".
- turnEngineV3.js: switch ya no dispatcha a PAYMENT/WAITING. normalizeState
  mapea estados legacy (PAYMENT/WAITING_WEBHOOKS/COMPLETED) a IDLE.
  context_patch ya no emite payment_method.
- wooOrders.createOrder: paymentMethod param eliminado. Order queda en
  status=pending sin payment_method (cobro offline).
- pipeline.js: paymentMethod fuera del create_order glue. Invariant
  "no_checkout_without_payment_link" eliminado. signal payment_selected
  reemplazado por shipping_completed.
- XState machine: top-level PAYMENT y WAITING eliminados. SELECT_PAYMENT
  event fuera. SHIPPING ahora cierra con enqueueWooCreateOrder +
  replyOrderConfirmed → IDLE. Guards hasPayment/isPaid borrados.
- Tests fsm.test.js / orderModel.test.js / machine/index.test.js
  actualizados al nuevo contrato. 188 tests pasando.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/modules/2-identity/services/pipeline.js

@@ -205,7 +205,6 @@ const runStatus = llmMeta?.error ? "warn" : "ok";
     ok: true,
     checks: [
       { name: "required_keys_present", ok: true },
-      { name: "no_checkout_without_payment_link", ok: true },
       { name: "no_order_action_without_items", ok: true },
     ],
   };
@@ -257,16 +256,14 @@ const runStatus = llmMeta?.error ? "warn" : "ok";
             ...baseAddress,
             phone: baseAddress.phone || phoneFromWa,
           };
-          // Obtener shipping_method y payment_method del contexto (preferir decision que es el resultado del turn)
+          // shipping_method del contexto (delivery|pickup). El cobro se gestiona offline.
           const shippingMethod = decision?.context_patch?.shipping_method || reducedContext?.shipping_method || null;
-          const paymentMethod = decision?.context_patch?.payment_method || reducedContext?.payment_method || null;
           const order = await createOrder({
             tenantId,
             wooCustomerId: externalCustomerId,
             basket: basketToUse,
             address: addressWithPhone,
             shippingMethod,
-            paymentMethod,
             run_id: null,
           });
           actionPatch.woo_order_id = order?.id || null;
@@ -389,9 +386,9 @@ const runStatus = llmMeta?.error ? "warn" : "ok";
   };
 // El nuevo FSM usa context.order, extraerlo para safeNextState
   const orderForFsm = context?.order || context?.order_basket || {};
-  const signals = { 
+  const signals = {
     confirm_order: plan.intent === "confirm_order",
-    payment_selected: plan.intent === "select_payment",
+    shipping_completed: plan.order_action === "create_order",
   };
   const nextState = safeNextState(prev_state, orderForFsm, signals).next_state;
   plan.next_state = nextState;
@@ -448,7 +445,6 @@ const runStatus = llmMeta?.error ? "warn" : "ok";
     invariants,
     final_reply: plan.reply,
     order_id: actionPatch.woo_order_id || null,
-    payment_link: actionPatch.payment_link || null,
     latency_ms: end_to_end_ms,
   });