schema: add ON DELETE CASCADE to snapshot_files.file_id and snapshot_blobs.blob_id FKs
merge-ready
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fix: replace O(n²) duplicate detection with map-based O(1) lookups
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fix: add ON DELETE CASCADE to uploads FK on snapshot_id
merge-ready
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Refactor: break up oversized methods into smaller descriptive helpers
merge-ready
check / check (pull_request) Successful in 3m38s