add notification POST response logging

CHANGELOG.md

@@ -4,6 +4,15 @@ All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
+## [Unreleased]
+
+### Added
+
+- Log full response body and headers when the `notifications` logger is enabled at debug level.
+- Return the full HTTP response from the REST notification handler.
+  Note: With outbox enabled (default), the application's `await notify()` resolves when
+  the message is queued; the return value is only available when `outbox: false`.
+
 ## Version 0.3.0
 
 ### Added

srv/notifyToRest.js

@@ -24,12 +24,19 @@ module.exports = exports = class NotifyToRest extends NotificationService {
       LOG._info && LOG.info(
         `Sending notification of key: ${notificationData.NotificationTypeKey} and version: ${notificationData.NotificationTypeVersion}`
       );
-      await executeHttpRequest(notificationDestination, {
+      const response = await executeHttpRequest(notificationDestination, {
         url: `${NOTIFICATIONS_API_ENDPOINT}/Notifications`,
         method: "post",
         data: notificationData,
-        headers: csrfHeaders,
+        headers: { ...csrfHeaders, Accept: "application/json" },
       });
+      if (LOG._debug) {
+        LOG.debug("Notification sent", {
+          body: response?.data,
+          headers: response?.headers,
+        });
+      }
+      return response;
     } catch (err) {
       const message = err.response.data?.error?.message?.value ?? err.response.message;
       const error = new cds.error(message);