review 001 remediation: the forked core's findings resolved

Batch 1 (F-1 + N-1 + S-2 + N-4):
- reply_success/reply_error write replies with write_all (partial-write
  hazard closed; the err_when-chaining idiom suppresses
  clippy::unused_io_amount — reproduced fresh via a five-variant probe)
- rfc1928.md's write_all bullet records both conversions and the real
  rule (replies are single-shot, all-or-nothing) + the lint blind spot
- reject's doc names the 0xff vocabulary choice (RFC 1929 needs only
  non-0x00); Addr::Domain's deliberating comment pinned

Batch 2 (coverage: L-1 + L-2 + L-3 + S-1):
- client v6 request encoding pinned (22 bytes, ATYP=4, slice bounds)
- Socks5Stream::shutdown() EOF/BrokenPipe propagation pinned
- wait_on_tcp's io-error arm + SocksServerError::to_reply_error's full
  mapping table + read_command's command-phase version mismatch covered
- S-1: read_address's 1-byte-field bound documented; decode-side
  255/256 boundary pinned both faces

Batch 3 (posture notes: C-1, C-2, N-2, N-3 — decided keep-with-note):
- ConnectError: hand-port map's companion (cut if the producer layer
  lands without consuming it); StandardAuthentication: ADR-005
  auth-split is the anticipated consumer; CheckResult same shape
- tracing: the fork's declared logging seam, noted in Cargo.toml

Coverage 92.63% → 93.09% regions / 95.40% → 96.07% lines; the named
gaps closed, the remainder is accepted-uncovered with disposition.
Review doc carries the re-verification + resolution record.

Verification: cargo test (39 lib + 37 differential), clippy
(all-targets + wasm32) -D warnings, fmt, doc, wasm check, MSRV 1.88,
publish dry-run — all green.

Cargo.toml

@@ -23,6 +23,10 @@ composed = []
 
 [dependencies]
 tokio = { version = "1", default-features = false, features = ["rt", "sync", "io-util", "macros", "time"] }
+# The fork's declared logging seam (rfc1928.md: upstream `log` calls
+# were dropped or re-pointed here); no source file references it yet —
+# the first consumer is expected to be the producer layer's
+# diagnostics (review 001 N-2).
 tracing = "0.1"
 thiserror = "2"