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Independent review fix commit (cold fork MERGEABLE-WITH-NITS + Codex BLOCKED, 2 Highs):
- Codex H1: a comma (0x2C) is a valid etagc and can appear INSIDE a quoted opaque-tag
("3,5" is ONE tag). The old Split(',') broke it into two malformed tokens → 400. Replaced
with a quote-aware position scanner that treats a comma as a separator only outside the
quotes; "3,5" is now one valid non-canonical tag → 412.
- Codex H2: RFC 7230 OWS is SP/HTAB only. string.Trim() also strips NBSP and other Unicode
whitespace, letting " * " masquerade as the "*" force-write escape. Trim only
(' ', '\t'); such input is now Malformed → 400.
- Fork nit: corrected the canonical-guard comment (interior-whitespace tags are rejected by
IsEtagc, not NumberStyles.None).
- CI Formatting gate: de-BOM the 8 touched legacy Application .cs (charset=utf-8, #311/#310).
- Tests: added comma-in-tag ("3,5", "x,y","3"), empty-element tolerance, NBSP-not-OWS,
trailing-junk, lowercase-weak, wildcard-in-list cases. Full ErsatzTV.Tests green (1556).
Refs #253 #197