chore: improve i18n workflow to prevent stale compiled translations (#18850)

https://sonarly.com/issue/22697?type=bug

The Docker image build did not run `lingui compile` before building the server and frontend, causing missing translation entries at runtime that flood logs with "Uncompiled message detected" warnings.

packages/twenty-server/src/engine/core-modules/i18n/i18n.service.ts

@@ -1,4 +1,4 @@
-import { Injectable, type OnModuleInit } from '@nestjs/common';
+import { Injectable, Logger, type OnModuleInit } from '@nestjs/common';
 
 import {
   type I18n,
@@ -42,6 +42,9 @@ import { messages as zhHantMessages } from 'src/engine/core-modules/i18n/locales
 
 @Injectable()
 export class I18nService implements OnModuleInit {
+  private readonly logger = new Logger(I18nService.name);
+  private readonly loggedMissingIds = new Set<string>();
+
   private i18nInstancesMap: Record<keyof typeof APP_LOCALES, I18n> =
     {} as Record<keyof typeof APP_LOCALES, I18n>;
 
@@ -83,7 +86,19 @@ export class I18nService implements OnModuleInit {
     (
       Object.entries(messagesByLocale) as [keyof typeof APP_LOCALES, Messages][]
     ).forEach(([locale, messages]) => {
-      const localeI18n = setupI18n();
+      const localeI18n = setupI18n({
+        missing: (_locale, id) => {
+          if (!this.loggedMissingIds.has(id)) {
+            this.loggedMissingIds.add(id);
+            this.logger.warn(
+              `Missing translation for message "${id}" in locale "${_locale}". ` +
+                'Compiled catalogs may be stale — run lingui compile.',
+            );
+          }
+
+          return id;
+        },
+      });
 
       localeI18n.load(locale, messages);
       localeI18n.activate(locale);