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 Removed outdated circuit breaker tests and replaced them with modern unit and integration test setups.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/infrastructure/persistence/build.gradle.kts

@@ -1,6 +1,18 @@
 plugins {
     alias(libs.plugins.kotlinJvm)
     alias(libs.plugins.kotlinJpa)
+    alias(libs.plugins.spring.boot) // Spring Boot Plugin hinzufügen
+    alias(libs.plugins.spring.dependencyManagement) // Dependency Management für Spring
+}
+
+// Library module: do not create an executable Spring Boot jar here.
+tasks.bootJar {
+    enabled = false
+}
+
+// Ensure a regular jar is produced instead.
+tasks.jar {
+    enabled = true
 }
 
 dependencies {
@@ -8,6 +20,9 @@ dependencies {
     implementation(projects.core.coreDomain)
     implementation(projects.platform.platformDependencies)
 
+    // Spring Boot Database dependencies
+    implementation(libs.bundles.database.complete)
+
     // Exposed
     implementation(libs.exposed.core)
     implementation(libs.exposed.jdbc)