feat(kb): record degree final grades and US 4.0 conversions

A Citadel application form asked for GPA and neither degree's
Abschlussnote existed anywhere in claims.json - only the M.Eng. thesis
grade. The single lead was an old CV extraction whose own provenance
note disclaims it and which already carries a known error, so it was not
safe to convert from. User confirmed both directly: M.Eng. 1.6 and
B.Eng. 2.4 on the German 1.0-4.0 scale.

US 4.0 equivalents recorded via the modified Bavarian formula, which
simplifies to 5.0 - G: 3.4 and 2.6. Both fields carry usage rules,
because a converted grade is easy to misuse. They are for application
forms and credential checks only, never to be presented as a natively
awarded GPA, and the German scale must always be stated alongside -
particularly for the bachelor, where the conversion makes a solid "gut"
read weaker to a US audience than it is.

Also flagged a percentile that does not agree with itself. The relative
grade is ECTS B, but this record said top 35%, the user said top 30%,
and ECTS B is formally the next 25% after the top 10%. Rather than pick
one, the field now says to check the certificate and notes that quoting
"ECTS grade B" alone is always safe. A specific percentile on an
application is exactly the kind of small number that a credential check
can contradict.

New grade_output_rule: neither grade belongs on a resume or in a cover
letter by default. Industry resumes omit grades, and the thesis 1.0 is
the only figure worth surfacing where academic performance is valued.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MHtzyTKBcg6BWhD5qFegtK

CLAUDE.md

@@ -194,6 +194,7 @@ _See `config.md` for user-specific corrections. Add verified errors here as you
 | 2026-07-27 | **Security Champion is 2025/2026 only, and is a team role — not an award.** Source files claimed "3 consecutive years (2023/24–2025/26)." User has now corrected this twice. **Default is OMIT** unless the JD explicitly requires security/DevSecOps. | `experience_swisscom.md` SW-5, `achievement_reframing_guide.md`, `skills_taxonomy.md` (3 rows) |
 | 2026-07-29 | **Atlassian Compass is the metadata/lineage platform for Swisscom data products** (user-supplied). Previously the KB named no catalogue/lineage product at all, which read as a hard gap against data-governance JDs. Practitioner use only — never claim admin, rollout or ownership. Does NOT license claiming Purview/Collibra/Alation. | `claims.json` (SW-7 scope + skills entry), `experience_swisscom.md` SW-7 |
 | 2026-08-02 | **Master's thesis verified against the PDF.** Vibration-based condition monitoring of CNC machine tools; hybrid **rule-based reasoning + 7-10-3 ANN**; throughput/latency evaluation (~500 SPS pipeline vs 72.9 kSPS sensors). **PSO was surveyed but NOT implemented** — an earlier note in this session wrongly listed it as an applied method. No real operational data and no accuracy figures: it is a methods prototype, not a validated system. Also recorded: ECTS relative grade **B (top 35%)**, English-language transcripts exist. | `claims.json` EDU-MENG |
+| 2026-08-26 | **Degree final grades were missing from the KB entirely.** A Citadel application form asked for GPA and neither degree's *Abschlussnote* was recorded anywhere in `claims.json` — only the M.Eng. **thesis** grade (1.0). The only lead was `knowledge_base/extractions/thiessen_cv_master_profile.md`, whose own provenance note says it is not authoritative and which already carries a known error (lists PSO as an applied thesis method, corrected 2026-08-02). User confirmed both grades directly: **M.Eng. 1.6, B.Eng. 2.4** (German scale, 1.0 best / 4.0 lowest pass). US 4.0 equivalents added via the modified Bavarian formula (`5.0 − G`): **3.4** and **2.6**. Also flagged an unsettled percentile: the ECTS relative grade is **B**, but the record said top 35%, the user said top 30%, and ECTS B is formally the next 25% after the top 10% — **quote "ECTS grade B" alone unless the certificate is checked.** New `grade_output_rule`: grades stay off the resume and cover letter by default; these fields exist for form questions and credential checks. | `claims.json` (EDU-MENG, EDU-BENG) |
 | 2026-08-25 | **Trading-domain evidence was entirely missing from the KB.** `claims.json` had 0 hits for trading, finance or quant, so a genuine capability was unusable in any document. Added **PP-1** (self-built, self-hosted single-user investing/signal platform: US-equity price/fundamental/sentiment ingestion, LLM-assisted sentiment, long-only cross-sectional residual 12-1 momentum book with ATR stop/trail and max 15 names, scheduled scan/backtest pipelines, web dashboard + Telegram alerts) and **PP-2** (Udacity *AI for Trading* nanodegree), plus two `allowed-with-context` skills. Both carry hard `forbidden` lists: **no PnL/Sharpe/return/backtest figure may ever be quoted**, never call PP-1 distributed/production/multi-user, never imply professional quant or finance experience, never present the nanodegree as a quant credential. PP-1 is the one place full-ownership verbs are correct — it is genuinely solo, unlike the employer work governed by Scope Discipline. | `claims.json` (claims PP-1, PP-2; skills "quantitative/systematic trading concepts", "backtesting") |
 | 2026-08-02 | **Bosch data types named.** Fab sensor/process data: defect-management records, wafer inspection images, PCM electrical parameters (user-confirmed). Previously the KB named no concrete sensor-data types for Bosch. | `claims.json` BS-2 |
 | 2026-07-27 | **Bullet density.** Fixed 1L/2L/3L and character-band rules made bullets uniform and encouraged page filling. | Replaced globally with natural-length, evidence-led bullets; character counts are diagnostic only. |