feat: alert usage overage worker failures

supabase/migrations/202606300017_usage_overage_audit_alert_rules.sql

@@ -0,0 +1,33 @@
+insert into public.platform_audit_alert_rules (
+  code, name, description, severity, action_patterns, target_types, conditions, metadata
+)
+values
+  (
+    'platform_usage_overage_invoice_created',
+    '平台用量超额自动开票',
+    '平台按 SaaS 套餐额度和月度用量自动生成超额服务费账单，应进入运营审计台。',
+    'medium',
+    array['platform.invoice.usage_overage_created', 'platform.invoice.usage_overage_batch_created'],
+    array['tenant_invoice', 'tenant_invoice_batch'],
+    '{"riskArea":"platform_usage_overage_billing"}'::jsonb,
+    '{"defaultRule":true}'::jsonb
+  ),
+  (
+    'platform_usage_overage_worker_failed',
+    '平台用量超额开票失败',
+    '平台用量超额账单 worker 执行失败，可能导致租户服务费漏收或月度账务不完整。',
+    'high',
+    array['platform.invoice.usage_overage_worker_failed'],
+    array['tenant_invoice_batch'],
+    '{"riskArea":"platform_usage_overage_billing","requiresFollowUp":true}'::jsonb,
+    '{"defaultRule":true}'::jsonb
+  )
+on conflict (code) do update
+set name = excluded.name,
+    description = excluded.description,
+    severity = excluded.severity,
+    action_patterns = excluded.action_patterns,
+    target_types = excluded.target_types,
+    conditions = excluded.conditions,
+    metadata = public.platform_audit_alert_rules.metadata || excluded.metadata,
+    updated_at = now();