Pinecone change history: [Serverless][AWS][us-west-2] 5xx errors and longer response times on upsert requests for some indexes.

Pinecone reported a major incident causing 5xx errors and longer response times for upsert requests on some Serverless indexes in AWS us-west-2. It started at 2026-05-25 13:41 UTC and was resolved at 2026-05-25 15:00 UTC, lasting 1 h 18 min. A fix was implemented, but no cause was stated.