Scheduled script that recreates the container only when the published
:stable image digest actually changed — no wasteful re-pulls. Compares
the registry manifest digest (anonymous Gitea token + :deserialize for
the token JSON) against a stored digest; recreates + records on change.
Verified end-to-end on RouterOS 7.21.2:
- token URL omits &service= (& is RouterOS's AND operator and breaks url=)
- header digest parsed case-insensitively from the flat http-headers string
- container identified by name; mounts via mountlists (list=, not name=)
- stop/start waits retry the operation (remove/start) rather than polling
a status string, which never matched and forced full timeouts
- no /container get ... status (status is a flag, not a gettable property)
- installed as a named /system/script (NOT /import, which only executes once)
