- Route cache_key values that look like asset UUIDs through asset_cache
in TelegramClient._get_cache_and_key. Single-asset sends previously
stored file_ids in url_cache while the media-group path stored them
in asset_cache, so repeat sends never hit.
- Extract build_asset_media_urls so the notification dispatcher
(asset_to_media) and the bot command handlers (common._format_assets)
share one rule for /video/playback vs thumbnail URLs.
- Add services/telegram_send.py as the single factory for constructing
a TelegramClient. It always wires the shared aiohttp session and both
file caches, so commands now reuse file_ids populated by notification
dispatches (and vice versa) instead of re-uploading the same bytes.
- send_reply / send_media_group in commands/handler.py now delegate to
the factory rather than constructing their own uncached clients.
alexei.dolgolyov
6de9a1289e