Pinecone change history: [Serverless][AWS][us-west-2] Unavailability for some read path operations for some indexes

Pinecone reported a major outage affecting some read-path operations for some Serverless indexes in AWS us-west-2, starting 2025-08-28 18:30 UTC and lasting 1 h 54 min. A fix was implemented by 2025-08-28 20:18 UTC, and the incident was resolved at 2025-08-28 20:25 UTC.