Add GCSMediaStorage, and share a CloudMediaStorage base with S3 - #334

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regiscamimura wants to merge 9 commits into

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regiscamimura:gcs-media-storage

Commits on Jul 27, 2026

Add GCSMediaStorage backend (Google Cloud Storage)
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Commits on Jul 29, 2026

Share a CloudMediaStorage base between the S3 and GCS backends

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Tidy up after review: move storage identity onto MediaStorage

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Fix defects found in review

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Address the items deferred from review

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Fix defects found in the second review round

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Fix signing scope and delete error masking

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Don't swallow the 404 for a missing bucket

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Compare stored bytes against the source file

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