Fixes#86161.
Route Telegram media-message edits through the Telegram caption/reply-markup APIs instead of always calling `editMessageText`. Button-only edits now update reply markup, explicit captions use `editMessageCaption`, and text edits can fall back to caption edits when Telegram reports the message has no editable text.
Also documents the edit behavior, adds regression coverage, tightens timer-spy cleanup for the affected agents test lane, and removes a stale loader helper from the current base that broke core typecheck.
Co-authored-by: Andy Ye <35905412+TurboTheTurtle@users.noreply.github.com>
0f1767a26a
