AWS Bedrock anthropic.claude-3-5-sonnet-20240620-v1:0: deprecated → retiring

AWS Bedrock anthropic.claude-3-5-sonnet-20240620-v1:0 (bedrock/anthropic.claude-3-5-sonnet-20240620-v1-0) is now retiring, previously deprecated. Scheduled retirement: 2026-07-30. Verified against the provider's own published schedule.