[breaking] Amazon Bedrock retires Nova Canvas, Nova Reel (EOL 2026-09-30)

Amazon Bedrock moves Amazon Nova Canvas, Amazon Nova Reel, Amazon Nova Reel to Legacy on 2026-03-30 with end-of-life on 2026-09-30. Bedrock lifecycle dates are platform-specific and may differ from the model provider's own schedule. announced_at reflects the documented Legacy date, when Bedrock notifies users. Effective: 2026-09-30. Affected: amazon/amazon.nova-canvas-v1:0, amazon/amazon.nova-reel-v1:0, amazon/amazon.nova-reel-v1:1. Severity: breaking. Verification: verified.