refactor(billing+entries): remove unused import and adjust tenant transaction signature

backend/services/billing/billing-service/src/main/kotlin/at/mocode/billing/service/config/BillingDatabaseConfiguration.kt

@@ -9,7 +9,6 @@ import org.jetbrains.exposed.v1.jdbc.transactions.transaction
 import org.slf4j.LoggerFactory
 import org.springframework.beans.factory.annotation.Value
 import org.springframework.context.annotation.Configuration
-import org.springframework.context.annotation.Profile
 
 @Configuration
 class BillingDatabaseConfiguration(

backend/services/entries/entries-service/src/main/kotlin/at/mocode/entries/service/tenant/ExposedTenantTransactions.kt

@@ -6,7 +6,7 @@ import org.jetbrains.exposed.v1.jdbc.transactions.transaction
 /**
  * Führt einen Exposed-Transaction-Block im Kontext des aktuellen Tenants aus und setzt das Suchpfad-Schema.
  */
-suspend inline fun <T> tenantTransaction(crossinline block: () -> T): T = transaction {
+inline fun <T> tenantTransaction(crossinline block: () -> T): T = transaction {
   val schema = TenantContextHolder.current()?.schemaName
     ?: error("No tenant in context. Ensure TenantWebFilter is installed and request has X-Event-Id")
   // Set search_path for this transaction/connection