Add fresh-prefix file upload concurrency - #367
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Record the post-PR #367 linux-xr storage-posture blocker packets, refresh product/workstream docs, and stabilize watcher assertions around platform-specific notify fan-out.
This was referenced May 13, 2026
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Summary
TCFS_UPLOAD_FILE_CONCURRENCYfor bounded regular-file fanout during explicit fresh-prefix pushesfile_upload_concurrencyin the linux-xr storage-posture wrapper and docs so the next S3 canary can prove the small-file phase explicitlyClaim boundary
This does not claim production S3 posture. It gives the storage-posture canary a bounded fresh-prefix lever for the small-file phase exposed by the linux-xr run. Production storage posture still needs a fresh host packet with endpoint/TLS/credential posture, object counts, retries, socket samples, timings, and hydration latency.
Validation
cargo test -p tcfs-sync --libcargo test -p tcfs-sync --lib file_concurrency -- --nocapturecargo test -p tcfs-sync --lib push_tree_concurrent -- --nocapturebash scripts/test-home-canary-linux-xr-storage-posture.shcargo fmt --all -- --checkgit diff --checktask docs:links