15:18:04.012info[auth]User login successful - uid=u_abc123, ip=192.168.1.12
15:18:04.388[cache]Cache HIT for key: product_catalog_v3 (TTL: 3420s)
15:18:05.001info[api]GET /api/v2/products 200 OK - 42ms
15:18:05.821warn[db]Slow query detected: SELECT * FROM orders (1842ms) - add index
15:18:06.190error[payment]Webhook signature verification failed: BadSignatureError
15:18:06.400info[api]POST /api/v2/checkout 201 Created - 129ms
15:18:07.511error[api]Unhandled exception: Cannot read properties of null (reading 'id')
15:18:08.340warn[api]Rate limit threshold at 85% - uid=u_def456
15:18:09.000info[mailer]Transactional email queued: order-confirm to alice@example.com
15:18:09.211[tracing]Span 'checkout_flow' completed - duration=312ms, status=ok
15:18:10.001error[db]Connection pool exhausted - 50/50 connections in use
15:18:10.500warn[storage]Object storage upload latency spike: 3.2s avg (expected <500ms)
15:18:11.000info[api]GET /api/v2/user/profile 200 OK - 18ms
15:18:12.000info[cdn]Cache purge successful - 142 edge nodes updated