Add plugin telemetry bridge capability

Expose telemetry.track through the plugin SDK and server host bridge, forward plugin-prefixed events into the shared telemetry client, and demonstrate the capability in the kitchen sink example.\n\nCo-Authored-By: Paperclip <noreply@paperclip.ing>

packages/plugins/examples/plugin-kitchen-sink-example/src/manifest.ts

@@ -41,6 +41,7 @@ const manifest: PaperclipPluginManifestV1 = {
     "goals.update",
     "activity.log.write",
     "metrics.write",
+    "telemetry.track",
     "plugin.state.read",
     "plugin.state.write",
     "events.subscribe",

packages/plugins/examples/plugin-kitchen-sink-example/src/worker.ts

@@ -405,6 +405,16 @@ async function registerActionHandlers(ctx: PluginContext): Promise<void> {
       data: { companyId },
     });
     await ctx.metrics.write("demo.events.emitted", 1, { source: "manual" });
+    await ctx.telemetry.track("demo_event", {
+      source: "manual",
+      has_company: Boolean(companyId),
+    });
+    pushRecord({
+      level: "info",
+      source: "telemetry",
+      message: "Tracked plugin telemetry event demo_event",
+      data: { companyId },
+    });
     return { ok: true, message };
   });