Fix device control response returning stale state

Add 300ms delay after executing device action before fetching new state,
allowing Home Assistant time to update the entity state.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/controllers/housekeeping_controller.py

@@ -4,6 +4,7 @@ Housekeeping Controller
 Provides API endpoints for home automation via Home Assistant.
 Designed for the Tatlock Housekeeper agent and other consumers.
 """
+import asyncio
 from fastapi import APIRouter, HTTPException, Query, Depends
 from typing import List, Dict, Any, Optional
 from pydantic import BaseModel, Field
@@ -413,6 +414,9 @@ class HousekeepingController(BaseController):
                 else:  # toggle
                     await ha.toggle(entity_id)
 
+                # Wait for HA to update state before fetching
+                await asyncio.sleep(0.3)
+
                 # Get new state
                 new_state = await ha.get_state(entity_id)