fix: return just the config value

Author: ludomikula

server/api-service/lowcoder-server/src/main/java/org/lowcoder/api/framework/plugin/SharedPluginServices.java

@@ -5,6 +5,7 @@
 import java.util.function.Consumer;
 
 import org.lowcoder.api.framework.plugin.endpoint.PluginEndpointHandler;
+import org.lowcoder.infra.config.model.ServerConfig;
 import org.lowcoder.infra.config.repository.ServerConfigRepository;
 import org.lowcoder.plugin.api.LowcoderServices;
 import org.lowcoder.plugin.api.PluginEndpoint;
@@ -54,6 +55,8 @@ public void setConfig(String key, Object value) {
 
 	@Override
 	public Object getConfig(String key) {
-		return serverConfigRepository.findByKey(key).block();
+               return serverConfigRepository.findByKey(key)
+                               .map(ServerConfig::getValue)
+                               .block();
 	}
 }