feat(i18n): full English translation of demo-epb

Phase 2 of the English translation:

Word documents (filled, EPB-specific):
- 8 plans (PID, PM, QA, SWE, Test, Project Manual, CM, RM)
- 6 safety docs (HARA, Safety Case, FMEDA, MISRA Compliance,
  Verification Report, Tool Qualification Cppcheck)
- 2 manuals (User, Service)
- 3 audit artefacts (Review minutes, NC-001, MISRA-REC-001)
- All regenerated via pandoc from English markdown sources

Code, tests, headers:
- All file headers, struct comments, function docstrings in English
- All test names (TEST_BEGIN strings) translated
- Inline comments translated
- 46 tests still green after translation

CI workflows:
- All step names in English
- Step descriptions, comments, release notes template in English

README.md fully rewritten in English with proper guided tour.

Phase 3 (still pending): dev-process repo templates + toolstack/setup docs.

docs/non-conformities-md/NC-001.md

@@ -1,60 +1,52 @@
 ---
 nc-id: NC-001
-projekt: demo-epb
-datum-festgestellt: 2026-05-11
-schwere: Critical
+project: demo-epb
+date-discovered: 2026-05-11
+severity: Critical
 status: Closed
 ---
 
-# Non-Conformity NC-001: Step-Counter-Ueberlauf nicht dokumentiert
+# Non-Conformity NC-001: Step counter overflow not documented
 
-| Feld                | Wert                              |
+| Field                | Value                              |
 |---------------------|-----------------------------------|
-| NC-ID               | NC-001                            |
-| Projekt             | demo-epb                          |
-| Datum festgestellt  | 2026-05-11                        |
-| Festgestellt durch  | Review REV-001                    |
-| Betroffenes Artefakt| `src/apply_controller.c`          |
-| Anforderung         | SWE-002 (Watchdog)                |
-| Schwere             | Critical                          |
+| NC ID               | NC-001                            |
+| Project             | demo-epb                          |
+| Date discovered     | 2026-05-11                        |
+| Discovered by       | Review REV-001                    |
+| Affected artefact    | `src/apply_controller.c`          |
+| Requirement         | SWE-002 (watchdog)                |
+| Severity            | Critical                          |
 | Status              | Closed                            |
 
 ---
 
-## 1. Beschreibung
+## 1. Description
 
-Der `step_count` im Apply-Controller ist als `uint32_t` deklariert und wird in
-`apply_ctrl_step_50ms` monoton inkrementiert. Bei 50 ms/Tick ueberlaeuft der
-Zaehler nach 2^32 * 50 ms ~= 6.8 Jahren. Der Watchdog in SWA-002 vergleicht
-zwar nur das Delta zwischen zwei Lese-Zugriffen (Wrap-Around unkritisch), aber
-das Verhalten ist nicht im Header dokumentiert und kann bei nachfolgender
-Code-Pflege Fehler erzeugen.
+`step_count` in the apply controller is declared as `uint32_t` and is monotonically incremented in `apply_ctrl_step_50ms`. At 50 ms/tick the counter overflows after 2^32 * 50 ms ≈ 6.8 years. The watchdog in SWA-002 only compares the delta between two reads (wrap-around safe), but the behaviour is not documented in the header and may lead to errors in subsequent maintenance.
 
-## 2. Risikobewertung
+## 2. Risk assessment
 
-| Aspekt            | Bewertung                                                     |
-|-------------------|----------------------------------------------------------------|
-| Auswirkung        | Theoretisch Watchdog-False-Negative bei Wrap-Around-Vergleich  |
-| Eintritts-Wahrscheinlichkeit | Sehr niedrig (6.8 Jahre Lebensdauer)                |
-| Sicherheits-Beitrag | Indirekt — Watchdog ist Teil der SG-01 Implementierung       |
+| Aspect            | Assessment                                                       |
+|-------------------|-------------------------------------------------------------------|
+| Effect            | In theory false-negative watchdog on wrap-around comparison       |
+| Likelihood        | Very low (6.8 years lifetime)                                     |
+| Safety contribution | Indirect — watchdog is part of the SG-01 implementation         |
 
-## 3. Sofortmassnahme
+## 3. Immediate action
 
-Header-Kommentar in `apply_controller.h` ergaenzt: explizite Beschreibung des
-Wrap-Around-Verhaltens. Watchdog-Implementierung (in SWA-001) muss Delta-
-Vergleich mit `uint32_t` Subtraktion verwenden (Wrap-safe).
+Header comment in `apply_controller.h` extended: explicit description of wrap-around behaviour. The watchdog implementation (in SWA-001) must use `uint32_t` subtraction for delta comparison (wrap-safe).
 
-## 4. Korrekturmassnahme (Root-Cause)
+## 4. Corrective action (root cause)
 
-Im Code-Review-Checklisten-Eintrag "Integer-Ueberlauf-Verhalten dokumentieren"
-ergaenzen. Pruefung in folgenden Reviews.
+Add the checklist item "document integer overflow behaviour" to the code-review checklist. Verify in subsequent reviews.
 
-## 5. Verifikation
+## 5. Verification
 
-- Kommentar in `apply_controller.h` v1.1 (Commit `<hash>`)
-- Watchdog in SWA-001 verwendet `uint32_t`-Subtraktion (siehe SWA-001 §4)
-- Review-Checkliste aktualisiert
+- Comment in `apply_controller.h` v1.1 (commit `<hash>`)
+- Watchdog in SWA-001 uses `uint32_t` subtraction (see SWA-001 §4)
+- Review checklist updated
 
-## 6. Abschluss
+## 6. Closure
 
-Geschlossen am 2026-05-11 durch S. Lohmaier nach Verifikation.
+Closed on 2026-05-11 by S. Lohmaier after verification.