fix: Narrowed the fix after self-review: dropped a global lexer

[singlaamitesh]

Fixes #4229

Fixes #0000

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Narrowed the fix after self-review: dropped a global lexer PATTERNS rule that risked mislabeling unrelated dot-joined words (e.g. 'License.Txt') anywhere in scanned text as a proper NAME, and replaced it with tokenizer logic scoped strictly to right after an Author/Authors tag, splitting a glued 'Author:Frankie.Chu' and/or a dot-joined 'Frankie.Chu' name into separate tokens so the existing AUTH+NNP+NNP grammar rule detects it (now also fixes the space-separated 'Author: Frankie.Chu' variant with no extra risk); full 4731-test cluecode regression suite passes except 2 pre-existing unrelated failures.

How this was tested: X

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