4.0.0

• Address review: full-write loops, zero-length reads, uniform stream consumption
• S3: server-side copy via CopyObject / UploadPartCopy
• Restore pre-increment style flagged by cold Rector run
• Make streaming the only I/O path in storage (4.0)

Changes: utopia-php/monorepo@storage/3.1.0...storage/4.0.0