fix(F08-F10): machine-checkable evidence, honest templates, demoted GPA

F08 - evidence metadata
- Only 1 of 26 claims carried structured source/last_verified/ownership, which
  is why recency and reference checks could not run. Added an evidence_schema
  block and an evidence block on all 26 claims.
- 8 dates were recovered from each claim's OWN recorded text; the other 18 are
  written as the literal "unrecorded". Nothing was inferred. "unrecorded" means
  nobody wrote it down, NOT that the claim is unevidenced - most carry evidence
  in their free-text scope.
- Coverage is reported as an advisory warning, never a gate: failing on it would
  push a future session to invent dates to clear the run.

F09 - templates
- resume_template.tex asserted "12+ years of production software experience".
  It does not hold: canonical employment starts 2014-11 (~11y10m) and the
  VISIBLE chronology starts 2015-05 (~11y4m) because Capgemini is omitted.
  Now "over ten years", with the arithmetic and the no-date-math rule inline.
- cv_template.tex still carries page targets, rendered-line budgets and 2L/3L
  variants the project dropped. Banner-marked as the ACADEMIC legacy path so it
  is not reached for whenever a posting says "CV".

F10 - US GPA
- The modified Bavarian formula converts FOREIGN grades INTO the German system.
  Inverting it to produce a US GPA is not a recognised method, and the TUM
  source calls even its forward calculator orientation only.
- Fields renamed to final_grade_us_4pt_orientation_only with that caveat. The
  German grades remain the canonical facts. If a recipient publishes its own
  conversion, use theirs and record which was used.

Validator PASS (1 advisory), 31/31 tests.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qej5SBvhcbGXHwLqNWiskM

resume_builder/templates/resume_template.tex

@@ -33,7 +33,7 @@
 \begin{document}
 
 \begin{rSection}{Summary}
-Staff data engineer with 12+ years of production software experience across telecom, semiconductor manufacturing, broadcast technology and insurance. Owns business-critical pipeline components at Swisscom and previously integrated containerized ML inference into a continuously operating Bosch semiconductor fab.
+Staff data engineer with over ten years of production software experience across telecom, semiconductor manufacturing, broadcast technology and insurance. Owns business-critical pipeline components at Swisscom and previously integrated containerized ML inference into a continuously operating Bosch semiconductor fab.
 \end{rSection}
 
 \begin{rSection}{Technical Skills}