chore(build, dependencies): add Room support with KSP integration and optimize testing dependencies

- Integrated Room plugin and runtime dependencies into `local-db` module, including schema configuration for Room.
- Added KSP processor dependencies for Kotlin Multiplatform compatibility.
- Enhanced `core-domain` module by refining and temporarily adjusting testing dependencies for resolution issues.

platform/platform-testing/build.gradle.kts

@@ -8,8 +8,21 @@ dependencies {
     // Importiert die zentrale BOM für konsistente Versionen.
     api(platform(projects.platform.platformBom))
     // Diese Bundles sind in `libs.versions.toml` definiert.
-    api(libs.bundles.testing.jvm)
-    api(libs.bundles.testcontainers)
+    // api(libs.bundles.testing.jvm)
+    api(libs.junit.jupiter.api)
+    api(libs.junit.jupiter.engine)
+    api(libs.junit.jupiter.params)
+    api(libs.junit.platform.launcher)
+    api(libs.mockk)
+    api(libs.assertj.core)
+    api(libs.kotlinx.coroutines.test)
+
+    // api(libs.bundles.testcontainers)
+    api(libs.testcontainers.core)
+    api(libs.testcontainers.junit.jupiter)
+    api(libs.testcontainers.postgresql)
+    api(libs.testcontainers.keycloak)
+
     // Macht Kafka- und Reactor-Test-Bibliotheken verfügbar
     api(libs.testcontainers.kafka)
     api(libs.reactor.test)