Pinecone change history: [Serverless][AWS][eu-west-1] 5xx errors on some write path operations

Pinecone reported a major incident causing 5xx errors on some Serverless write path operations in AWS eu-west-1, affecting customers writing to indexes in that region. It started at 2025-11-06 14:38 UTC and was resolved at 2025-11-06 14:40 UTC, lasting 2 min; no cause or fix was stated.