docs: translate remaining architectural guides to German and standardize formatting

Translated all remaining English architectural documents into German, including ADRs, guides, release notes, and reference materials. Standardized formatting across translated files, updated section headings, and localized inline comments within code examples for consistency.

docs/90_Reports/2026-01-31_E2E_Smoke_Migration_Exposed_Ktor.md

@@ -9,7 +9,7 @@ tags: [e2e, smoke, docker, migration, ktor-3.4.0, exposed-1.0.0]
 
 # E2E Smoke – Migration Exposed 1.0.0 & Ktor 3.4.0
 
-## Setup
+## Einrichtung
 - Compose: docker compose --profile all up --build -d
 - Services (Auszug):
   - api-gateway (8080/actuator, 8080/api via Proxy)
@@ -25,11 +25,11 @@ tags: [e2e, smoke, docker, migration, ktor-3.4.0, exposed-1.0.0]
 - Web-App Health: 200 OK (Fallback-Assets aktiv, Favicon bereitgestellt)
 - Desktop-App: Xvfb/XFCE/x11vnc/noVNC aktiv, Zugriff via http://localhost:6080/
 
-## Observability
+## Beobachtbarkeit
 - Prometheus-Metriken erreichbar (Gateway/Ping)
 - Logs ohne kritische Fehler im Happy Path
 
-## Issues & Notes
+## Probleme & Hinweise
 - Frontend KMP/JS-Build schlägt in Builder aktuell fehl (fehlende JS-Implementierungen in Auth/Ping-Data). Nginx liefert Fallback-Assets aus; Favicon hinzugefügt, um 404 zu vermeiden.
 
 ## Entscheidung