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.
Archived several outdated reports (`Ping-Service_Impl_01-2026.md`, `Frontend_Integration_Status.md`, etc.) and added archival notes and references to updated documents. Introduced a centralized reference structure for tech stack documentation, consolidating files under `01_Architecture/Reference/Tech_Stack`. Added new resources (`Gradle_Kotlin_DSL_Primer`, `Kotlin_2-3-0_ReleaseNotes`) for improved project organization and clarity.
stefan