feat(core): improve runtime observability

packages/core/src/event-logger.ts

@@ -0,0 +1,24 @@
+export * as EventLogger from "./event-logger"
+
+import { Effect, Layer } from "effect"
+import { makeGlobalNode } from "./effect/app-node"
+import { EventV2 } from "./event"
+
+const Types = new Set([
+  "agent.updated",
+  "catalog.updated",
+  "command.updated",
+  "config.updated",
+])
+
+export const layer = Layer.effectDiscard(
+  Effect.gen(function* () {
+    const events = yield* EventV2.Service
+    const unsubscribe = yield* events.listen((event) =>
+      Types.has(event.type) ? Effect.logInfo("event", { event }) : Effect.void,
+    )
+    yield* Effect.addFinalizer(() => unsubscribe)
+  }),
+)
+
+export const node = makeGlobalNode({ name: "event-logger", layer, deps: [EventV2.node] })