chore: update module dependencies and remove unused imports

- Added `backend.infrastructure.persistence` to `@SpringBootApplication` scanBasePackages in `IdentityServiceApplication` and included it as a dependency in `build.gradle.kts`.
- Cleaned up unused imports in several files, including `Screens.kt`, `VeranstaltungScreens.kt`, and `TurnierAbrechnungTab.kt`.
- Updated `PingJpaEntity` to include `@Column` annotation for `createdAt` field.
- Refactored import ordering in `ZnsImportServiceTest` and `DatabaseFactory`.

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

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

@@ -15,6 +15,8 @@ dependencies {
   implementation(projects.core.coreUtils)
   implementation(projects.backend.services.identity.identityDomain)
   implementation(projects.backend.services.identity.identityInfrastructure)
+  implementation(projects.backend.infrastructure.security)
+  implementation(projects.backend.infrastructure.persistence)
 
   implementation(libs.spring.boot.starter.web)
   implementation(libs.spring.boot.starter.validation)

backend/services/identity/identity-service/src/main/kotlin/at/mocode/identity/service/IdentityServiceApplication.kt

@@ -3,7 +3,7 @@ package at.mocode.identity.service
 import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
 
-@SpringBootApplication(scanBasePackages = ["at.mocode.identity", "at.mocode.infrastructure.security"])
+@SpringBootApplication(scanBasePackages = ["at.mocode.identity", "at.mocode.infrastructure.security", "at.mocode.backend.infrastructure.persistence"])
 class IdentityServiceApplication
 
 fun main(args: Array<String>) {