chore(main): release storage 1.56.0

[release-please[bot]]

:robot: I have created a release beep boop

1.56.0 (2025-06-18)

Features

• storage/internal: Add option in IpFilter to allow all P4SA access to bucket (9614487)
• storage/internal: Add option to enable object retention in CreateBucket API (9614487)
• storage/internal: Add option to override unlocked retention in UpdateObject API (9614487)
• storage/internal: Add support for object retention config in Bucket (9614487)
• storage/internal: Added support for encryption enforcement config in Bucket (9614487)
• storage: Add IpFilter to bucketAttrs (#12020) (942c770)

Bug Fixes

• storage: Avoid integration test segfaults. (#12419) (a9dec07)
• storage: Current object generation takeover. (#12383) (9ca8e01)

Documentation

• storage/internal: Fix broken link for message CustomPlacementConfig (9614487)
• storage: Fix typo in storage/doc.go (#12391) (bf74408)
• storage: Improve error inspection documentation (#12301) (420da1a)

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