Log response body snippet in Homestay session expired error

room_cal/service_api/_homestay.py

@@ -77,7 +77,7 @@ class _HomestayClient:
     if 'application/json' not in r.headers.get('content-type', ''):
       mark_stale('homestay')
       raise HomestayAuthError(
-        f'Homestay session expired (HTTP {r.status_code}, content-type: {r.headers.get("content-type", "none")!r}) — run: {_AUTH_HINT}'
+        f'Homestay session expired (HTTP {r.status_code}, content-type: {r.headers.get("content-type", "none")!r}, body: {r.text[:200]!r}) — run: {_AUTH_HINT}'
       )
     return r.json()