Add PetKit food watchdog + D4H raw probes

- petkit_food_check.py: watchdog для state.food (алярм мало/пусто, сброс при доливе)
- petkit_raw.py, petkit_roster.py: прямые запросы к API для отладки
- .gitignore: исключить .food_state (runtime состояние)

petkit_roster.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python3
+"""Сырой вывод PetKit device roster (что реально возвращает API), без парсинга."""
+import asyncio, json, os
+from datetime import datetime
+from aiohttp import ClientSession
+from petkitaio import PetKitClient
+from petkitaio.constants import Endpoint
+
+HERE = os.path.dirname(os.path.abspath(__file__))
+
+
+def load_env():
+    p = os.path.join(HERE, ".env")
+    for line in open(p):
+        line = line.strip()
+        if line and not line.startswith("#") and "=" in line:
+            k, _, v = line.partition("=")
+            os.environ.setdefault(k.strip(), v.strip().strip('"').strip("'"))
+
+
+async def main():
+    load_env()
+    s = ClientSession()
+    c = PetKitClient(
+        os.environ["PETKIT_EMAIL"],
+        os.environ["PETKIT_PASSWORD"],
+        s,
+        os.environ.get("PETKIT_REGION", "Russian Federation"),
+    )
+    await c.login()
+    print("=== AUTH ===")
+    print("user_id:", c.user_id, " group_ids:", list(c.group_ids), " base:", c.base_url)
+
+    url = f"{c.base_url}{Endpoint.DEVICE_ROSTER}"
+    hdr = await c.create_header()
+    day = str(datetime.now().date()).replace("-", "")
+    print(f"\n=== RAW DEVICE ROSTER (day={day}) ===")
+    for gid in c.group_ids:
+        data = {"day": day, "groupId": gid}
+        resp = await c._post(url, hdr, data)
+        print(f"--- group {gid} ---")
+        print(json.dumps(resp, ensure_ascii=False, indent=2))
+    await s.close()
+
+
+asyncio.run(main())