fix(backoffice): merchant-friendly wording in Monitoring

Analytics, Reports, and Diagnostics were already clean (no raw
HTTP/queue-worker strings found on audit). Monitoring had three spots
speaking developer language by default:

- Background queue names ("order-notifications") -> friendly labels
  ("Order notifications").
- Webhook event keys ("order.created") -> friendly labels ("New order
  placed").
- Activity log's "api" category showed the raw HTTP line
  ("GET /api/products responded 200 in 84ms") as the primary message.
  Now shows a plain-language summary by default ("Product data
  refreshed successfully"), with the raw string moved to a collapsed
  "Technical details" <details> per event (api/error/warning rows).

src/app/i18n/en.ts

@@ -1850,6 +1850,7 @@ export const en: Translations = {
     category: 'Category',
     level: 'Severity',
     message: 'Description',
+    technicalDetails: 'Technical details',
     categoryValue: {
       all: 'All categories',
       audit: 'Admin activity',

src/app/i18n/hy.ts

@@ -1845,6 +1845,7 @@ export const hy: Translations = {
     category: 'Կատեգորիա',
     level: 'Կարևորություն',
     message: 'Նկարագրություն',
+    technicalDetails: 'Տեխնիկական մանրամասներ',
     categoryValue: {
       all: 'Բոլոր կատեգորիաները',
       audit: 'Ադմինի գործողություններ',

src/app/i18n/ru.ts

@@ -1845,6 +1845,7 @@ export const ru: Translations = {
     category: 'Категория',
     level: 'Важность',
     message: 'Описание',
+    technicalDetails: 'Технические детали',
     categoryValue: {
       all: 'Все категории',
       audit: 'Действия администраторов',

src/app/i18n/translations.ts

@@ -1858,6 +1858,7 @@ export interface Translations {
     category: string;
     level: string;
     message: string;
+    technicalDetails: string;
     categoryValue: {
       all: string;
       audit: string;