fix(latex): brace bracket-leading bullets, document escapes, pin pdftotext encoding

Three findings from the 2026-08-19 review (F9, F31, F34):

- F9: every placeholder bullet written as \item [text] let LaTeX parse
  the bracketed text as the item's optional label, rendering it clipped
  off the left page edge and absent from the PDF text layer ("Achievement"
  appeared 9 times in cv/main_example.tex and 0 times in the extraction,
  with a clean compile and green CI). Bullets are now braced as
  \item {[text]} in the example CV and in the template
  06-cover-letter-templates.md teaches, and CI's stock PDF assertions
  additionally require "Achievement" to survive pdftotext.

- F31: 05-cv-templates.md gains a "LaTeX Special Characters" section and
  06's is completed beyond \_ and \&. The load-bearing case is an
  unescaped % in a quantified achievement bullet: it starts a LaTeX
  comment and silently deletes the rest of the line from the PDF.

- F34: the documented ATS extraction commands (apply.md,
  05-cv-templates.md, CLAUDE.md) now carry -enc UTF-8. Xpdf-based
  pdftotext builds default to Latin-1 output, so a correct non-ASCII CV
  failed the replacement-character parseability check.

framework_version: 05-cv-templates.md 1.4.1 -> 1.4.2,
06-cover-letter-templates.md 1.0.1 -> 1.0.2. All three pinned by the new
tests/test_latex_guidance.py (9 tests; suite now 261).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -144,7 +144,8 @@ jobs:
           python3 tools/verify_pdf.py cv/main_example.pdf \
             --pages 2 \
             --contains '[your.email@example.com]' \
-            --contains 'Professional Experience'
+            --contains 'Professional Experience' \
+            --contains 'Achievement'
           python3 tools/verify_pdf.py cover_letters/cover_example.pdf \
             --pages 1 \
             --contains 'your.email@example.com' \