refactor(wire): Phase 868 mux-wire modularization (v0.8.835)

Split pearcord-drive/mux-wire into common/v1/v2/gossip modules with unchanged
barrel exports. Add dual-stack live smoke, view rpcWireVersion, and doc/CI
hardening. No behavior change; default PEARCORD_RPC_WIRE remains v1.

mixins/runtime/view/platform-view-mixin.js

@@ -2904,7 +2904,8 @@ async view (opts = {}) {
       ? this._guildSidecarStores.get(this.guild.guild.id)?.exportSlice() || null
       : null,
     readReceiptSyncRows: await this._readReceiptSyncRowsForView(this.guild?.guild?.id),
-    sparseAckSyncRows: this._sparseAckSyncRowsForView(this.guild?.guild?.id)
+    sparseAckSyncRows: this._sparseAckSyncRowsForView(this.guild?.guild?.id),
+    rpcWireVersion: sharedScope.getRpcWireVersionLabel()
   }
 },
 

platform-pearcord-shared-imports.js

@@ -55,5 +55,6 @@ module.exports = {
   DEFAULT_ATTACHMENT_MAX_BYTES: shared.DEFAULT_ATTACHMENT_MAX_BYTES,
   guildTopic: shared.guildTopic,
   id: shared.id,
-  now: shared.now
+  now: shared.now,
+  getRpcWireVersionLabel: shared.getRpcWireVersionLabel
 }