refactor(build, dependencies): introduce SQLDelight WebWorker setup, update Spring Boot dependencies, and align versions

Configured `sqlite.worker.js` for OPFS-backed SQLite WASM operations in the frontend build pipeline. Added new Spring Boot dependency bundles including secure service configurations. Integrated updated database utilities with enhanced error handling. Removed outdated circuit breaker tests and replaced them with modern unit and integration test setups.

backend/services/ping/ping-service/build.gradle.kts

@@ -15,17 +15,19 @@ kotlin {
 dependencies {
     // === Project Dependencies ===
     implementation(projects.contracts.pingApi)
+
+    // Our central BOM for consistent versions
+    implementation(platform(projects.platform.platformBom))
     implementation(projects.platform.platformDependencies)
     // NEU: Zugriff auf die verschobenen DatabaseUtils
     implementation(projects.backend.infrastructure.persistence)
 
     // === Spring Boot & Cloud ===
-    implementation(libs.bundles.spring.boot.service.complete)
-    // WICHTIG: Da wir JPA (blockierend) nutzen, brauchen wir Spring MVC (nicht WebFlux)
-    implementation(libs.spring.boot.starter.web)
-
-    // Service Discovery
-    implementation(libs.spring.cloud.starter.consul.discovery)
+    // Standard dependencies for a secure microservice
+    implementation(libs.bundles.spring.boot.secure.service)
+    // Common service extras
+    implementation(libs.spring.boot.starter.validation)
+    implementation(libs.spring.boot.starter.json)
 
     // === Database & Persistence ===
     implementation(libs.bundles.database.complete)
@@ -37,8 +39,13 @@ dependencies {
 
     // === Testing ===
     testImplementation(libs.bundles.testing.jvm)
+    testImplementation(libs.spring.boot.starter.test)
+    testImplementation(libs.spring.security.test)
 }
 
 tasks.test {
     useJUnitPlatform()
+    testLogging {
+        showStandardStreams = true
+    }
 }