Pinecone change history: [SERVERLESS][Azure][eastus2] 5xx errors for some namespaces

Pinecone reported a critical incident causing 5xx errors for some Serverless namespaces in Azure eastus2. It started at 2026-07-21 19:10 UTC and was resolved at 2026-07-21 19:40 UTC, with a reported duration of 29 min; Pinecone identified the issue and implemented a fix but did not specify the cause.