feature: Feat: Feature Store in Sagemaker SDK v3 (5496)

[aviruthen]

Description

Feature Store functionality ALREADY EXISTS in SDK V3 within the sagemaker-mlops package at sagemaker.mlops.feature_store. The issue is a documentation/discoverability gap — users migrating from V2 (sagemaker.feature_store) cannot find Feature Store in V3 because: (1) the namespace changed from sagemaker.feature_store to sagemaker.mlops.feature_store, (2) the migration.md only has a single row mentioning Feature Store without detailed guidance, (3) the README.md for sagemaker-mlops doesn't mention Feature Store at all, and (4) there's a detailed MIGRATION_GUIDE.md inside the feature_store directory but it's not referenced from any top-level documentation. The V3 Feature Store is fully implemented with: FeatureGroup (re-exported from sagemaker-core), feature definitions, ingestion manager, Athena queries, dataset builder, feature processor, and all associated enums/utilities. The fix requires documentation improvements across multiple files to make Feature Store discoverable.

Related Issue

Related issue: 5496

Changes Made

• sagemaker-mlops/src/sagemaker/mlops/__init__.py
• sagemaker-mlops/README.md
• migration.md
• docs/sagemaker_core/index.rst
• sagemaker-mlops/tests/unit/sagemaker/mlops/feature_store/test_feature_store_init.py

AI-Generated PR

This PR was automatically generated by the PySDK Issue Agent.

• Confidence score: 85%
• Classification: type: feature request
• SDK version target: V3

Merge Checklist

• Changes are backward compatible
• Commit message follows prefix: description format
• Unit tests added/updated
• Integration tests added (if applicable)
• Documentation updated (if applicable)