feat(v0.8.680): Phase 705 stage instance CSV & guild event export mesh parity

Complete signed guild stage instance CSV mesh export and guild notification
event export (RPC 128/129): stage-csv-ui.js, stage-csv-mixin.js,
delivery-receipts store, guild gossip handlers, ui-flow IPC, deep link
?stage-csv=1, agentctl stage + guild event journeys, smokes, and docs.

Bundle: npm run test:ci-phase705 (50/50). Roadmap Phase 705 complete; Phase 706 slot opened.

index.js

@@ -586,6 +586,12 @@ class PearcordGuild extends EventEmitter {
     if (method === RPC.FORUM_TAG_EXPORT_CSV_SYNC) {
       this.emit('forum-tag-export-csv-sync', payload)
     }
+    if (method === RPC.STAGE_INSTANCE_CSV_SYNC) {
+      this.emit('stage-instance-csv-sync', payload)
+    }
+    if (method === RPC.GUILD_EVENT_EXPORT_CSV_SYNC) {
+      this.emit('guild-event-export-csv-sync', payload)
+    }
     if (method === RPC.MESSAGE_SEARCH_REQUEST) {
       this.emit('message-search-request', payload)
     }
@@ -898,6 +904,14 @@ class PearcordGuild extends EventEmitter {
       this.emit('forum-tag-export-csv-sync', payload)
       return
     }
+    if (method === RPC.STAGE_INSTANCE_CSV_SYNC) {
+      this.emit('stage-instance-csv-sync', payload)
+      return
+    }
+    if (method === RPC.GUILD_EVENT_EXPORT_CSV_SYNC) {
+      this.emit('guild-event-export-csv-sync', payload)
+      return
+    }
     if (method === RPC.AUDIT_EXPORT_ARCHIVE) {
       this.emit('audit-export-archive', payload)
       return
@@ -1267,6 +1281,14 @@ class PearcordGuild extends EventEmitter {
     broadcastGossip(this, RPC.FORUM_TAG_EXPORT_CSV_SYNC, payload)
   }
 
+  gossipStageInstanceCsvSync (payload) {
+    broadcastGossip(this, RPC.STAGE_INSTANCE_CSV_SYNC, payload)
+  }
+
+  gossipGuildEventExportCsvSync (payload) {
+    broadcastGossip(this, RPC.GUILD_EVENT_EXPORT_CSV_SYNC, payload)
+  }
+
   gossipAuditExportArchive (payload) {
     broadcastGossip(this, RPC.AUDIT_EXPORT_ARCHIVE, payload)
   }