infra: clean up Keycloak configuration, enforce consistency in .env, and improve health checks

Streamlined Keycloak configurations with defaults for development and production in `.env`. Added health checks and improved environment variable documentation with comments to differentiate local and server deployments. Ensured compatibility with pre-built registry images.

docs/02_Guides/SQLDelight_Integration_Compose_Multiplatform.md

@@ -1,3 +1,8 @@
+---
+type: Guide
+status: ACTIVE
+owner: Frontend Expert
+---
 # SQLDelight Integration in Compose Multiplatform
 
 This guide shows how to integrate SQLDelight in a Compose Multiplatform project with Koin dependency injection.

docs/02_Guides/SQLDelight_Web_Asynchron.md

@@ -1,3 +1,8 @@
+---
+type: Guide
+status: ACTIVE
+owner: Frontend Expert
+---
 # Architekturstrategien für Asynchrone Persistenz in Kotlin Multiplatform: Eine umfassende Analyse zur Integration von SQLDelight in Web-Umgebungen
 
 ## 1. Einleitung und Problemstellung