Pinecone change history: [Serverless][GCP][us-central1] 5xx errors on some read operations for some indexes

Pinecone reported a major incident causing 5xx errors on some read operations for some Serverless indexes in GCP us-central1. It started at 2026-03-04 21:06 UTC and was resolved at 2026-03-04 22:16 UTC, lasting 1 h 10 min. A fix was implemented; affected customers could encounter failed reads during the incident.