Update Komodo addon script: switch source GitHub URL to moghtech, create a timestamped backup of the compose env before updating, and add migrations for Komodo v2. Migrate image tag from 'latest' to ':2', rename DB credential variables (KOMODO_DB_* -> KOMODO_DATABASE_*), remove the deprecated KOMODO_PASSKEY, and ensure COMPOSE_KOMODO_BACKUPS_PATH is set. Adjust install routine to stop generating/setting PASSKEY and to use the new DATABASE variable names.
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