docs: log session outcomes and apply enhancements across multiple components

- **Docker Fixes:** Resolved failed builds for Gateway and Ping services by switching to `eclipse-temurin:21-jdk-alpine`, correcting Gradle configurations, and fixing cache mount paths.
- **ZNS-Import Consul Registration:** Enabled Consul service discovery by updating `application.yaml` and `build.gradle.kts`.
- **pgAdmin Provisioning:** Preconfigured the database server in `servers.json` and updated `dc-ops.yaml` for seamless setup.
- **Postman Documentation:** Added a detailed Postman test guide covering environment setup, endpoint groups, and recommended test sequences.

Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>

backend/services/ping/Dockerfile

@@ -5,15 +5,16 @@
 # ===================================================================
 
 # === CENTRALIZED BUILD ARGUMENTS ===
-ARG GRADLE_VERSION=9.3.1
-ARG JAVA_VERSION=25
+# HINWEIS: gradle:X.Y-jdkZ-alpine Images existieren nicht für alle Gradle/JDK-Kombinationen.
+# Wir verwenden eclipse-temurin als Builder-Basis und das Projekt-eigene ./gradlew-Wrapper.
+ARG JAVA_VERSION=21
 ARG BUILD_DATE
 ARG VERSION
 
 # ===================================================================
 # Build Stage
 # ===================================================================
-FROM gradle:${GRADLE_VERSION}-jdk${JAVA_VERSION}-alpine AS builder
+FROM eclipse-temurin:${JAVA_VERSION}-jdk-alpine AS builder
 
 ARG VERSION
 ARG BUILD_DATE
@@ -33,7 +34,7 @@ ENV GRADLE_OPTS="-Dorg.gradle.caching=true \
                  -XX:+UseParallelGC \
                  -XX:MaxMetaspaceSize=512m"
 
-ENV GRADLE_USER_HOME=/home/gradle/.gradle
+ENV GRADLE_USER_HOME=/root/.gradle
 
 # Copy gradle wrapper and configuration files
 COPY gradlew gradlew.bat gradle.properties settings.gradle.kts ./
@@ -64,19 +65,26 @@ RUN mkdir -p \
     frontend/shells/meldestelle-portal \
     frontend/shells/meldestelle-desktop \
     frontend/features/zns-import-feature \
+    frontend/features/veranstalter-feature \
+    frontend/features/veranstaltung-feature \
+    frontend/features/profile-feature \
+    frontend/features/reiter-feature \
+    frontend/features/pferde-feature \
+    frontend/features/verein-feature \
+    frontend/features/turnier-feature \
+    frontend/features/billing-feature \
     docs
 
 # Copy root build configuration
 COPY build.gradle.kts ./
 
 # Download and cache dependencies
-RUN --mount=type=cache,id=gradle-cache-ping,target=/home/gradle/.gradle/caches \
-    --mount=type=cache,id=gradle-wrapper-ping,target=/home/gradle/.gradle/wrapper \
+RUN --mount=type=cache,id=gradle-cache-ping,target=/root/.gradle/caches \
+    --mount=type=cache,id=gradle-wrapper-ping,target=/root/.gradle/wrapper \
     ./gradlew :backend:services:ping:ping-service:dependencies --no-daemon --info
-
 # Build the application
-RUN --mount=type=cache,id=gradle-cache-ping,target=/home/gradle/.gradle/caches \
-    --mount=type=cache,id=gradle-wrapper-ping,target=/home/gradle/.gradle/wrapper \
+RUN --mount=type=cache,id=gradle-cache-ping,target=/root/.gradle/caches \
+    --mount=type=cache,id=gradle-wrapper-ping,target=/root/.gradle/wrapper \
     ./gradlew :backend:services:ping:ping-service:bootJar --no-daemon --info
 
 # ===================================================================