OZG-4097 Always use configuration bean

src/main/java/de/ozgcloud/nachrichten/postfach/osiv2/config/Osi2PostfachProperties.java

@@ -7,7 +7,6 @@ import jakarta.validation.Valid;
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
 
-import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.context.annotation.Configuration;
 
@@ -18,7 +17,7 @@ import lombok.Setter;
 @Getter
 @Setter
 @Configuration
-@ConditionalOnProperty(prefix = Osi2PostfachProperties.PREFIX, name = "enabled", havingValue = "true")
+@ConfigurationProperties(prefix = Osi2PostfachProperties.PREFIX)
 @RequiredArgsConstructor
 public class Osi2PostfachProperties {
 	// From de.ozgcloud.nachrichten.NachrichtenManagerConfiguration