Pinecone change history: [Serverless][AWS][us-west-2] 5xx errors on the readpath

Pinecone reported a major incident causing readpath 5xx errors for Serverless Indexes in AWS us-west-2, from 2026-09-17 05:37 UTC to 2026-09-17 16:44 UTC (11 h 7 min). Pinecone reported mitigation underway, followed by recovery monitoring and resolution; no specific cause or fix was stated.