v2.18.0-beta.16

Fixed

• Discord's /selfupdate works again. It called a method that never existed (check_selfupdate), so the command just errored out — the same kind of latent break as /changelog had. It triggers the real self-update now, in the background so the "started" reply goes out right away. Found during the tidy-up below, and a test now checks that every method the Discord side borrows from the Telegram side actually exists.

Changed

• Container state, stats and disk facts moved into a neutral container_info module. They had lived on the Telegram bot, and the Discord bot reached across into that instance to borrow all three; both call the shared module as equals now, so the two front ends stop depending on each other. What /status shows is unchanged. (Continuing the code tidy-up that started with the changelog module.)

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Beta series thread: #63 — previous: v2.18.0-beta.15. Pulls as :beta; :latest stays on 2.17.0.