Fix Snackbar crashing the whole app (#15774)

This PR fixes a crash of the app when a Snackbar tries to render an
object.

<img width="3002" height="754" alt="image"
src="https://github.com/user-attachments/assets/988f97eb-5c8a-44f8-ac8e-e2953b872bac"
/>

What happened : the backend sent a MessageDescriptor in
`extensions.userFriendlyMessage` while it should have sent a translated
string.

But it is a problem that the Snackbar can end up rendering objects and
crashing the whole app because it is a the highest level in the tree.

So this PR hardens many points to avoid future bugs : 
- Sanitize what is rendered by the Snackbar to avoid any crash
- Translate any MessageDescriptor object that could end up in the
frontend
- Fix the places in the backend where a MessageDescriptor wasn't
translated and sent directly to the frontend in
`use-graphql-error-handler.hook.ts`

Fixes https://github.com/twentyhq/twenty/issues/15685
Fixes https://github.com/twentyhq/core-team-issues/issues/1869

packages/twenty-server/src/engine/core-modules/graphql/hooks/use-graphql-error-handler.hook.ts

@@ -248,6 +248,9 @@ export const useGraphQLErrorHandlerHook = <
     onValidate: ({ context, validateFn, params: { documentAST, schema } }) => {
       const errors = validateFn(schema, documentAST);
 
+      const userLocale = context.req.locale ?? SOURCE_LOCALE;
+      const i18n = options.i18nService.getI18nInstance(userLocale);
+
       if (Array.isArray(errors) && errors.length > 0) {
         const headers = context.req.headers;
         const currentMetadataVersion = context.req.workspaceMetadataVersion;
@@ -267,9 +270,12 @@ export const useGraphQLErrorHandlerHook = <
           options.metricsService.incrementCounter({
             key: MetricsKeys.SchemaVersionMismatch,
           });
+
           throw new GraphQLError(SCHEMA_MISMATCH_ERROR, {
             extensions: {
-              userFriendlyMessage: msg`Your workspace has been updated with a new data model. Please refresh the page.`,
+              userFriendlyMessage: i18n._(
+                msg`Your workspace has been updated with a new data model. Please refresh the page.`,
+              ),
             },
           });
         }
@@ -297,7 +303,9 @@ export const useGraphQLErrorHandlerHook = <
           throw new GraphQLError(APP_VERSION_MISMATCH_ERROR, {
             extensions: {
               code: APP_VERSION_MISMATCH_CODE,
-              userFriendlyMessage: msg`Your app version is out of date. Please refresh the page to continue.`,
+              userFriendlyMessage: i18n._(
+                msg`Your app version is out of date. Please refresh the page to continue.`,
+              ),
             },
           });
         }