v3.19.0

SageMaker Python SDK 3.19.0

New Features

• feat(train): Add SequenceLength support for SFT, DPO, RLVR, RLAIF trainers (#5965)
• feat(train): Job notifications, log streaming, and metrics visualization for training jobs (#6051)
• feat(serve): Model Reuse — reuse previously built models across deployments (#6051)
• feat(core): Nova follow-ups — IAM role resolution and training utils (#6051)

Bug Fixes

• fix(serve): propagate additional_model_data_sources for JumpStart models (#6151)
• fix(serve): forward tolerance flags from get_jumpstart_configs (#6137)
• fix(serve): create local model_path dir before using it as download dir (#6147)
• fix(serve): remove IC data-source collapse hack from recommendation deploy (#6101)