Add system metrics snapshot

main.py

@@ -5,6 +5,7 @@ from app import bot, dp, cfg, ADMIN_ID
 from keyboards import menu_kb
 from services.docker import discover_containers, docker_watchdog
 from services.alerts import monitor_resources, monitor_smart
+from services.metrics import MetricsStore, start_sampler
 from services.queue import worker as queue_worker
 from services.notify import notify
 import state
@@ -36,6 +37,8 @@ async def main():
         asyncio.create_task(monitor_resources(cfg, notify, bot, ADMIN_ID))
     if cfg.get("alerts", {}).get("smart_enabled", True):
         asyncio.create_task(monitor_smart(cfg, notify, bot, ADMIN_ID))
+    state.METRICS_STORE = MetricsStore()
+    asyncio.create_task(start_sampler(state.METRICS_STORE, interval=5))
     asyncio.create_task(queue_worker())
     await notify_start()
     await dp.start_polling(bot)