feat: sync langpack and auth updates

Sync telesrv commits 49f9bab and 04d9563 into the public mirror. Exclude private docs and runtime key material per sync rules.

internal/rpc/router_dispatch_test.go

@@ -1206,6 +1206,7 @@ func TestTDesktopStartupRPCsEncode(t *testing.T) {
 			LastName:   "User",
 			Phone:      "15550000000",
 		}},
+		LangPack: seededLangPackService(t),
 	}, zaptest.NewLogger(t), clock.System)
 
 	tests := []struct {