feat(build): Refactor infrastructure modules and establish single source of truth

This commit introduces a major refactoring of the build system and the core infrastructure modules. The primary goal is to establish a strict "Single Source of Truth" for all dependencies using Gradle Version Catalogs and to create a clean, maintainable, and scalable foundation for all current and future services.

### 1. Centralized Dependency Management (`libs.versions.toml`)

- **Established Single Source of Truth:** All dependency versions are now exclusively managed in `gradle/libs.versions.toml`. Hardcoded versions have been removed from all build scripts.
- **Introduced Gradle Bundles:** To simplify module dependencies, several bundles have been created (e.g., `testing-jvm`, `redis-cache`, `spring-cloud-gateway`, `monitoring-client`). This drastically reduces boilerplate in the `build.gradle.kts` files and improves readability.
- **Cleaned up Aliases:** All library and plugin aliases have been standardized for consistency.

### 2. Infrastructure Module Refactoring

All infrastructure modules (`core`, `platform`, `auth`, `cache`, `event-store`, `messaging`, `monitoring`, `gateway`) have been refactored to align with the new dependency management strategy.

- **Simplified Build Scripts:** The `build.gradle.kts` for each module now uses the new bundles and aliases, making them significantly cleaner and easier to understand.
- **Consistent Structure:** The architecture of each module now clearly follows the Port-Adapter pattern where applicable (e.g., `cache-api`/`redis-cache`).
- **Standardized `platform-bom`:** The project's own Bill of Materials (`platform-bom`) now also includes the Spring Cloud BOM, ensuring version consistency for all Spring-related dependencies.

### 3. Added Infrastructure Documentation

To improve onboarding and architectural understanding, a dedicated `README-*.md` file has been created for each refactored infrastructure module:
- `README-CORE.md`
- `README-PLATFORM.md`
- `README-INFRA-AUTH.md`
- `README-INFRA-CACHE.md`
- `README-INFRA-EVENT-STORE.md`
- `README-INFRA-MESSAGING.md`
- `README-INFRA-MONITORING.md`
- `README-INFRA-GATEWAY.md`

These documents explain the purpose, architecture, and usage of each component within the system. This lays the groundwork for our "Tracer Bullet" development approach.

settings.gradle.kts

@@ -17,25 +17,6 @@ pluginManagement {
 
 dependencyResolutionManagement {
 
-    /*repositories {
-        mavenCentral()
-        google {
-            mavenContent {
-                includeGroupAndSubgroups("androidx")
-                includeGroupAndSubgroups("com.android")
-                includeGroupAndSubgroups("com.google")
-            }
-        }
-        // Add JitPack repository
-        maven {
-            url = uri("https://jitpack.io")
-        }
-        // Add Sonatype snapshots repository
-        maven {
-            url = uri("https://oss.sonatype.org/content/repositories/snapshots/")
-        }
-    }*/
-
     repositories {
         mavenCentral()
         google()
@@ -44,15 +25,30 @@ dependencyResolutionManagement {
     }
 }
 
+// Core modules
+include(":core:core-domain")
+include(":core:core-utils")
+
 // Platform modules
 include(":platform:platform-bom")
 include(":platform:platform-dependencies")
 include(":platform:platform-testing")
 
-// Core modules
-include(":core:core-domain")
-include(":core:core-utils")
+// Infrastructure modules
+include(":infrastructure:gateway")
+include(":infrastructure:auth:auth-client")
+include(":infrastructure:auth:auth-server")
+include(":infrastructure:messaging:messaging-client")
+include(":infrastructure:messaging:messaging-config")
+include(":infrastructure:cache:cache-api")
+include(":infrastructure:cache:redis-cache")
+include(":infrastructure:event-store:event-store-api")
+include(":infrastructure:event-store:redis-event-store")
+include(":infrastructure:monitoring:monitoring-client")
+include(":infrastructure:monitoring:monitoring-server")
 
+/*
+// Temporär deaktivierte Fach-Module
 // Members modules
 include(":members:members-domain")
 include(":members:members-application")
@@ -81,22 +77,11 @@ include(":masterdata:masterdata-infrastructure")
 include(":masterdata:masterdata-api")
 include(":masterdata:masterdata-service")
 
-// Infrastructure modules
-include(":infrastructure:gateway")
-include(":infrastructure:auth:auth-client")
-include(":infrastructure:auth:auth-server")
-include(":infrastructure:messaging:messaging-client")
-include(":infrastructure:messaging:messaging-config")
-include(":infrastructure:cache:cache-api")
-include(":infrastructure:cache:redis-cache")
-include(":infrastructure:event-store:event-store-api")
-include(":infrastructure:event-store:redis-event-store")
-include(":infrastructure:monitoring:monitoring-client")
-include(":infrastructure:monitoring:monitoring-server")
-
 // Client modules
 include(":client:common-ui")
 include(":client:web-app")
 include(":client:desktop-app")
 
 // Legacy modules have been removed after successful migration
+
+ */