modernc.org/sqlite v1.55.0：DSN 参数校验顺序变更
CHANGELOG.md: document the DSN validation-order change
使用 modernc.org/sqlite 的开发者注意：v1.55.0 改变了 DSN 参数的校验顺序，影响 _txlock、_timezone 等长期存在的参数。升级前请检查你的 DSN 配置，确保参数在应用前都能通过校验。
Adds a v1.55.0 entry for validating every DSN parameter before applying any of them. It gets its own bullet rather than folding into the !134 paragraph because it changes behavior for parameters that have shipped for years - _txlock, _timezone, _time_format, _time_integer_format, _inttotime and _texttotime - so it concerns readers who never touch the new mattn-compatible keys. The alias-selection fix is folded into the !134 paragraph instead. v1.55.0 is not tagged, so no release ever shipped the fallback behavior and describing it as a fix would document a bug nobody could have hit. Also corrects that paragraph's closing claim that "all other existing parameters are unchanged", which the validation-order change made false: those parameters are affected in when they are validated, though not in what they accept or what they mean. Co-Authored-By: Claude Opus 4.8 <[email protected]>
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