Disabled settings editing for Stripe Connect when limit is enabled (#24364)

closes [BAE-330](https://linear.app/ghost/issue/BAE-330/ghost-implement-server-sid
  e-limit-validations)

- Added `errorIfWouldGoOverLimit` check for 'limitStripeConnect' when editing
  Stripe settings
- Prevents updating Stripe Connect settings when the limit is enabled
- Added E2E tests to verify the limit enforcement works correctly
- The limit check is performed when `stripeConnectData` is present during settings
   edit

Author: sam-lord

ghost/core/core/server/services/settings/SettingsBREADService.js

@@ -24,12 +24,14 @@ class SettingsBREADService {
      * @param {Object} options.singleUseTokenProvider
      * @param {Object} options.urlUtils
      * @param {Object} options.labsService - labs service instance
+     * @param {Object} options.limitsService - limits service instance
      * @param {{service: Object}} options.emailAddressService
      */
-    constructor({SettingsModel, settingsCache, labsService, mail, singleUseTokenProvider, urlUtils, emailAddressService}) {
+    constructor({SettingsModel, settingsCache, labsService, limitsService, mail, singleUseTokenProvider, urlUtils, emailAddressService}) {
         this.SettingsModel = SettingsModel;
         this.settingsCache = settingsCache;
         this.labs = labsService;
+        this.limitsService = limitsService;
         this.emailAddressService = emailAddressService;
 
         /* email verification setup */
@@ -194,6 +196,8 @@ class SettingsBREADService {
         }
 
         if (stripeConnectData) {
+            await this.limitsService.errorIfWouldGoOverLimit('limitStripeConnect');
+
             filteredSettings.push({
                 key: 'stripe_connect_publishable_key',
                 value: stripeConnectData.public_key

ghost/core/core/server/services/settings/settings-service.js

@@ -5,6 +5,7 @@
 const events = require('../../lib/common/events');
 const models = require('../../models');
 const labs = require('../../../shared/labs');
+const limits = require('../limits');
 const config = require('../../../shared/config');
 const adapterManager = require('../adapter-manager');
 const SettingsCache = require('../../../shared/settings-cache');
@@ -30,6 +31,7 @@ const getSettingsBREADServiceInstance = () => {
         SettingsModel: models.Settings,
         settingsCache: SettingsCache,
         labsService: labs,
+        limitsService: limits,
         mail,
         singleUseTokenProvider: new SingleUseTokenProvider({
             SingleUseTokenModel: models.SingleUseToken,