fix: restore guild gossip wire by protocol on shared swarm

Use getGossipWireSession/clearGossipWireSession for pearcord-gossip so
ensure/re-attach no longer steals or clobbers contacts/discovery planes.

index.js

@@ -9,8 +9,15 @@ const {
   COLLECTIONS, id, now, guildTopic, topicToBuffer, CHANNEL_TYPES, RPC
 } = require('pearcord-shared')
 const {
-  attachGossipMesh, broadcastGossip, ensureGuildWireChannels
+  attachGossipMesh,
+  broadcastGossip,
+  ensureGuildWireChannels,
+  GOSSIP_PROTOCOL
 } = require('./mesh')
+const {
+  getGossipWireSession,
+  clearGossipWireSession
+} = require('pearcord-drive/mux-wire')
 const { attachDriveMesh, requestAttachmentFromPeers } = require('pearcord-drive/attach-mesh')
 const { attachVoiceMesh, broadcastVoiceMedia } = require('pearcord-voice-media')
 const { attachScreenMesh, broadcastScreenMedia } = require('pearcord-screen-share')
@@ -1728,11 +1735,9 @@ class PearcordGuild extends EventEmitter {
       } catch {
         /* ignore */
       }
-      if (conn._pearcordGossipWire?.session === existing) {
-        conn._pearcordGossipWire = null
-      }
+      clearGossipWireSession(conn, GOSSIP_PROTOCOL, existing)
     }
-    const restored = conn._pearcordGossipWire?.session
+    const restored = getGossipWireSession(conn, GOSSIP_PROTOCOL)
     if (!force && this._isLiveRpcSession(restored)) {
       this._channels.set(peerId, restored)
       return restored
@@ -1743,7 +1748,7 @@ class PearcordGuild extends EventEmitter {
       return ch || null
     } catch (err) {
       if (err?.code === 'DUPLICATE_CHANNEL' || /DUPLICATE/i.test(String(err?.message || ''))) {
-        const retry = conn._pearcordGossipWire?.session
+        const retry = getGossipWireSession(conn, GOSSIP_PROTOCOL)
         if (this._isLiveRpcSession(retry)) {
           this._channels.set(peerId, retry)
           return retry

mesh.js

@@ -4,7 +4,8 @@ const { wireSwarmConnection } = require('pearcord-shared')
 const {
   attachGossipWireSession,
   broadcastGossipToSessions,
-  requestGossipFromPeer
+  requestGossipFromPeer,
+  getGossipWireSession
 } = require('pearcord-drive/mux-wire')
 
 const GOSSIP_PROTOCOL = 'pearcord-gossip-v1'
@@ -22,10 +23,8 @@ function attachGossipMesh (guild, conn) {
 }
 
 function restoreGossipWireFromConn (conn) {
-  const session = conn._pearcordGossipWire?.session
-  const rpc = session?.v2?.rpc
-  if (session && rpc && !rpc.closed && !rpc._destroyed) return session
-  return null
+  // Protocol-keyed: shared swarm also holds contacts/discovery planes.
+  return getGossipWireSession(conn, GOSSIP_PROTOCOL)
 }
 
 function ensureGuildWireChannels (guild) {