fix: complete October 22 workflow feedback and request failure recovery

scripts/admin-test-env-modules/finance-full-fixtures.mjs

@@ -366,7 +366,7 @@ async function loadPricingEvidence(context) {
   return { activeVersionIds: active.map((item) => id(item.id)).filter(Boolean), profiles }
 }
 
-async function ensureCustomerChargeRule(context, resource, profile) {
+export async function ensureCustomerChargeRule(context, resource, profile) {
   if (context.financeFixtureHooks?.ensureCustomerChargeRule) {
     return context.financeFixtureHooks.ensureCustomerChargeRule(context, resource, profile)
   }
@@ -389,6 +389,15 @@ async function ensureCustomerChargeRule(context, resource, profile) {
   const applicable = rows(listed).filter((rule) => rule?.status === 'ACTIVE'
     && rule?.businessType === businessType && rule?.taxMode === 'TAX_EXCLUDED')
   let desired = applicable.find((rule) => rule?.chargeMode === profile.chargeUnit)
+  if (context.options?.fixedCustomerId) {
+    const defaults = applicable.filter(rule => rule.defaultRule === true)
+    const selected = applicable.length === 1 ? applicable[0] : defaults.length === 1 ? defaults[0] : null
+    const valid = selected?.id && id(selected.customerId) === tenantId && selected.chargeMode === profile.chargeUnit
+    context.assert(MODULE, '固定客户复用现有有效默认计费方式', listResponse, Boolean(valid),
+      `customerId=${tenantId}, chargeMode=${profile.chargeUnit}`, OPTIONS)
+    if (!valid) throw new Error('固定客户缺少匹配且无歧义的计费规则，禁止自动创建或切换默认规则')
+    return selected
+  }
   if (!desired) {
     const effectiveFrom = new Date(Date.now() - 86_400_000).toISOString().slice(0, 19)
     const body = {