feat(09-02): convert high-frequency callsites to granular emitEvent

- Replace publishDomainChanged() with granular events at 9 high-frequency callsites
- saveTask/deleteTask emit task-updated events in ipc-core-work-graph-handlers
- decideApproval emits approval-updated, addComment emits task-updated
- worker-service emits run-updated for status changes and completion
- worker-service emits agent-updated for budget hard-stop pause
- orchestration-service emits agent-updated for auto-pause, run-updated for dispatch
- Wire emitEvent dependency to orchestration-service via service-graph
- Keep publishDomainChanged for low-frequency and multi-entity paths

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

src/main/service-graph.ts

@@ -169,6 +169,7 @@ export function createServiceGraph({
       db,
       logger,
       publishDomainChanged,
+      emitEvent,
       notify,
       createRunToken,
       getApiPort: () => apiServerRef.current?.getPort() ?? 0,