Reconcile the accepted safe federation helper with E2EE integration hardening and complete PIN-based encrypted DMs

Hop-State: A_06FPC0CGS3F7SJG3BGW0YF0
Hop-Proposal: R_06FPC0BK6YEV7XASNM7C908
Hop-Task: T_06FPAWA3279RBMJAR0BHM10
Hop-Attempt: AT_06FPBZWSBFTB9B5YH9JY9QR

src/lib/swarm/safe-federation-http.ts

@@ -20,10 +20,14 @@ const EXACT_DEVELOPMENT_LOOPBACK_URL =
   /^http:\/\/(?:localhost|127\.0\.0\.1|\[::1\])(?::\d{1,5})?(?:[/?#]|$)/i;
 const FORBIDDEN_REQUEST_HEADERS = new Set([
   'accept-encoding',
+  'authorization',
   'connection',
   'content-length',
+  'cookie',
+  'expect',
   'host',
   'proxy-authorization',
+  'proxy-connection',
   'te',
   'trailer',
   'transfer-encoding',