feat(server): attachment object storage, quotas, and reference lifecycle - #1986

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fix/1664-attachment-s3-migration

Commits on Jul 23, 2026

feat(server): attachment governance config, quota constants, and error classes

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89bee1c
feat(server): attachment lifecycle schema — org/state/object_key, reference ledger, avatar key

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ce97d66
feat(server): S3-compatible object storage service and MinIO test infrastructure

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e992299
feat(server): streaming attachment upload/download with quotas, and avatar payloads in object storage

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4a0f294
feat(server): attachment reference ledger — validated edges on send/edit, delete on last reference removed

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014397e
feat(server): attachment orphan sweep — pending TTL, verified orphan pass, tombstone retry

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50dd07b
feat(server): migrate:attachments command — bytea payloads to object storage with governance backfill

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ed4993e
fix(server): cross-cancel streaming upload halves and skip SDK checksum body wrapping

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ae435fc
fix(server): adjudicate 0-row migration swaps instead of deleting blindly

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5edbeaf
test(server): streaming cross-cancel coverage and wire-contract pins

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6d0af69