🐛(frontend) reduce PostHog volume from web vitals and opt_in spam

$opt_in fired on every reconnect since opt_in_capturing() captures an
event by default, even though this call just re-enables tracking after
a network drop and isn't a real consent action. Also disable web
vitals capture, which fed a single low-value insight.

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to
 ### Added
 
 - ✨(helm) allow disallowing search engine indexing per instance #2694
+- 🐛(frontend) reduce PostHog volume from web vitals and opt_in spam #2701
 
 ### Fixed
 

src/frontend/apps/impress/src/services/PosthogAnalytic.tsx

@@ -69,6 +69,7 @@ export function PostHogProvider({
       },
       capture_pageview: false,
       capture_pageleave: true,
+      capture_performance: { web_vitals: false },
     });
 
     const handleRouteChange = () => posthog?.capture('$pageview');
@@ -85,7 +86,7 @@ export function PostHogProvider({
     if (isOffline) {
       posthog.opt_out_capturing();
     } else {
-      posthog.opt_in_capturing();
+      posthog.opt_in_capturing({ captureEventName: false });
     }
   }, [isOffline]);