feat(verify_pdf): add --ascii-dates, the non-folding check for the documented date-range rule (#385) (#498)

* feat(verify_pdf): add --ascii-dates, the non-folding check for the documented date-range rule (#385)

05-cv-templates.md records a real Workday import that dropped a role's
end date because `2016--2024` reaches the text layer as 2016<U+2013>2024,
and tells Step 5d to confirm every entry's years are joined by an ASCII
hyphen. Nothing executed that. The natural probe, --contains "2016-2024",
failed identically for "en-dashed" and "absent" before #458 and passes on
both since, because the fold maps the en-dash back to "-" on purpose.

Add --ascii-dates: scan the raw text layer (never the fold) for a year
joined to any Unicode dash or the minus sign and fail naming each hit
with its line and code point. A year on either side of the dash is
enough (Mar 2016 - Jul 2016, 2016 - Present); a numeric range with no
year is not a date. The dump is still written before the check fails.

Wire it in: Step 5d's extraction command carries the flag and the
"Dates recognizable" item points at it, keeping the bare single-year
half as a read-through; the guide's "add this to the step 5d checks"
paragraph names the command (framework_version 1.4.4 -> 1.4.5); the
upstream-only CI assertion runs it on the stock CV.

Demonstrated on the stock template compiled with lualatex through both
extractors: a \cventry{2016--2024} build fails with U+2013 while
--contains "2016-2024" passes on it; the \cventry{2016-2024} build passes
both; the untouched stock CV passes the CI assertion.

Ten new test_verify_pdf.py cases. Proposed by 9scorp4 in Discussion #385.

* fix(verify_pdf): --ascii-dates only joins a year and a dash across horizontal whitespace

`\s*` between the year and the dash also matched a newline, so a heading
ending in an ASCII date ("Heading 1988-1994\n- note") joined the dash
that merely opened the next line and was reported as a U+2013 range; the
mirror shape ("Six Sigma -\n2016 onwards") did the same. Both are real
text-layer shapes: a dash used as a bullet, a wrapped prose line.

Match horizontal whitespace only ([^\S\n]*). Every existing case still
passes; three fixtures pin the two newline shapes and the same-line
spaced dash that must still be caught.

Found in review by yang2632, with the regex and the fixture.

.github/workflows/ci.yml

@@ -176,6 +176,7 @@ jobs:
         run: |
           python3 tools/verify_pdf.py cv/main_example.pdf \
             --pages 2 \
+            --ascii-dates \
             --contains '[your.email@example.com]' \
             --contains 'Professional Experience' \
             --contains 'Achievement'