feat(commands): per-chat album scope derived from notification routing

The "per-chat album scope" feature stored on CommandTrackerListener was
really per-bot: listener_id = bot.id, and every chat that bot served
shared the same scope.  Commands like /albums, /random, /status,
/events leaked the full provider catalog into chats that were never
wired up to receive notifications from those trackers.

New model: the album scope for /commands in a given chat is derived
from the notification-routing graph.  For a (provider, bot, chat_id)
triple we walk TargetReceiver (chat_id match, enabled) →
NotificationTarget (telegram or broadcast parent) →
NotificationTrackerTarget → NotificationTracker (provider match) and
union their collection_ids.  That's the natural "what does this chat
get notifications about" set, and it becomes the command scope.

- New helper: command_utils.resolve_chat_album_scope(provider_id,
  bot_id, chat_id) -> set[str].  Empty set is the default for chats
  with no routing — commands return nothing rather than leaking the
  provider's catalog.
- Dispatcher computes the scope per (tracker, bot, chat) and threads
  it through handler.handle(..., allowed_album_ids=...).  Explicit
  CommandTrackerListener.allowed_album_ids override, when set, still
  wins verbatim (kept as an escape hatch for users who want a divergent
  scope for a whole bot).
- /status, /albums, /events, and all /_cmd_immich-routed commands
  (/random, /search, /find, /latest, /memory, /summary, /favorites,
  /place, /person) now intersect with the resolved scope.
- UI scope modal relabeled: it's an explicit *override for this bot*,
  not a per-chat setting.  Default is "derive from notification
  routing", which matches what users already configured elsewhere.

Also:
- /search, /find, /person, /place — _enrich_assets return value was
  discarded, dropping public_url enrichment.  Assign the return value.
- search_smart / search_metadata — consolidated into _search_items
  helper that logs non-200 responses and transport errors instead of
  silently returning [].  Makes "always no results" bugs actually
  diagnosable.  Also accepts the alternate {"assets": [...]} flat-list
  shape from older Immich versions.
- Immich search error bodies go through _redact_body so credentials
  echoed by authenticating proxies don't land in server logs.

frontend/src/lib/i18n/ru.json

@@ -802,11 +802,11 @@
 		"selectBot": "Выберите бота...",
 		"listenerType": "telegram_bot",
 		"editScope": "Изменить область альбомов",
-		"scopeAll": "все альбомы",
+		"scopeAll": "из маршрутизации уведомлений",
 		"albumsShort": "альбомов",
-		"scopeTitle": "Область альбомов для этого чата",
-		"scopeDescription": "Ограничить, какие отслеживаемые альбомы доступны в этом чате через команды. Оставьте \"наследовать\", чтобы разрешить все альбомы трекера.",
-		"scopeInherit": "Наследовать: разрешить все отслеживаемые альбомы",
+		"scopeTitle": "Переопределение области альбомов для этого бота",
+		"scopeDescription": "По умолчанию команды этого бота видят только альбомы, уведомления которых приходят в его чаты (вычисляется из ваших трекеров уведомлений). Задайте явный список здесь, чтобы расширить или сузить этот набор для всех чатов данного бота.",
+		"scopeInherit": "Наследовать: вычислить из маршрутизации уведомлений",
 		"noCollections": "Нет доступных альбомов."
 	},
 	"snackbar": {