Completes TODO #6. The bot accepted photo, animation, video, voice and
sticker; music files, documents and round videos were silently dropped.
- Replace the five near-identical media handlers with one dispatch table.
Animations are matched before documents because Telegram populates
both fields for a GIF, so the old ordering would have filed every GIF
as a document once document support existed.
- Store video notes as "video". Telegram has no cached inline result for
video notes, so this is what keeps round videos searchable; it costs
the round presentation on playback.
- Build inline results from a table keyed by media_type, and cover audio
and document. A test asserts every storable type has a builder, so a
new media type cannot be added without a way to return it.
- Reuse one MEDIA_FILTER for both the idle and mid-keyword handlers;
the second list had already drifted from the first.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
goyban