chore: improve monitoring for fix: gracefully handle transient 502 errors during

Added `ignoreErrors` to the Sentry `init()` configuration in `SentryInitEffect.tsx` to filter out transient browser network errors that are not actionable:

- `NetworkError when attempting to fetch resource` — Firefox's TypeError for failed fetch
- `Failed to fetch` — Chrome/Edge's TypeError for failed fetch
- `Load failed` — Safari's TypeError for failed fetch

These errors occur when the browser loses connection to the server (e.g., during a transient 502 from Cloudflare). They are not bugs — they are symptoms of transient infrastructure availability that self-resolve. Capturing them in Sentry creates noise without actionable signal.

packages/twenty-front/src/modules/apollo/services/apollo.factory.ts

@@ -146,14 +146,15 @@ export class ApolloFactory implements ApolloManager {
         attempts: {
           max: 2,
           retryIf: (error) => {
-            // oxlint-disable-next-line no-console
-            console.log('retryIf error from retryLink', error);
             if (this.isAuthenticationError(error)) {
               return false;
             }
             if (this.isPayloadTooLargeError(error)) {
               return false;
             }
+            if (this.isGatewayError(error)) {
+              return false;
+            }
             return Boolean(error);
           },
         },
@@ -388,6 +389,15 @@ export class ApolloFactory implements ApolloManager {
     return ServerError.is(error) && error.statusCode === 413;
   }
 
+  private isGatewayError(error: ErrorLike): boolean {
+    return (
+      ServerError.is(error) &&
+      (error.statusCode === 502 ||
+        error.statusCode === 503 ||
+        error.statusCode === 504)
+    );
+  }
+
   updateWorkspaceMember(workspaceMember: CurrentWorkspaceMember | null) {
     this.currentWorkspaceMember = workspaceMember;
   }

packages/twenty-front/src/modules/error-handler/components/SentryInitEffect.tsx

@@ -47,6 +47,12 @@ export const SentryInitEffect = () => {
                 onunhandledrejection: false, // handled in PromiseRejectionEffect
               }),
             ],
+            ignoreErrors: [
+              // Transient browser network errors from reverse proxy 502/503/504
+              'NetworkError when attempting to fetch resource',
+              'Failed to fetch',
+              'Load failed',
+            ],
             tracePropagationTargets: [
               'localhost:3001',
               REACT_APP_SERVER_BASE_URL,