feat(plugins): bridge core domain events to plugin event bus

The plugin event bus accepts subscriptions for core events like
issue.created but nothing emits them. This adds a bridge in
logActivity() so every domain action that's already logged also
fires a PluginEvent to subscribing plugins.

Uses a module-level setter (same pattern as publishLiveEvent)
to avoid threading the bus through all route handlers. Only
actions matching PLUGIN_EVENT_TYPES are forwarded.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/services/activity-log.ts

@@ -1,8 +1,21 @@
+import { randomUUID } from "node:crypto";
 import type { Db } from "@paperclipai/db";
 import { activityLog } from "@paperclipai/db";
+import { PLUGIN_EVENT_TYPES, type PluginEventType } from "@paperclipai/shared";
+import type { PluginEvent } from "@paperclipai/plugin-sdk";
 import { publishLiveEvent } from "./live-events.js";
 import { redactCurrentUserValue } from "../log-redaction.js";
 import { sanitizeRecord } from "../redaction.js";
+import type { PluginEventBus } from "./plugin-event-bus.js";
+
+const PLUGIN_EVENT_SET: ReadonlySet<string> = new Set(PLUGIN_EVENT_TYPES);
+
+let _pluginEventBus: PluginEventBus | null = null;
+
+/** Wire the plugin event bus so domain events are forwarded to plugins. */
+export function setPluginEventBus(bus: PluginEventBus): void {
+  _pluginEventBus = bus;
+}
 
 export interface LogActivityInput {
   companyId: string;
@@ -45,4 +58,23 @@ export async function logActivity(db: Db, input: LogActivityInput) {
       details: redactedDetails,
     },
   });
+
+  if (_pluginEventBus && PLUGIN_EVENT_SET.has(input.action)) {
+    const event: PluginEvent = {
+      eventId: randomUUID(),
+      eventType: input.action as PluginEventType,
+      occurredAt: new Date().toISOString(),
+      actorId: input.actorId,
+      actorType: input.actorType,
+      entityId: input.entityId,
+      entityType: input.entityType,
+      companyId: input.companyId,
+      payload: {
+        ...redactedDetails,
+        agentId: input.agentId ?? null,
+        runId: input.runId ?? null,
+      },
+    };
+    void _pluginEventBus.emit(event).catch(() => {});
+  }
 }