Replace the last hard-coded Chinese log/print strings in the Flask
graph API, OASIS profile generator, and retry utility with calls to
the existing t() helper, completing the backend i18n coverage started
by ticket #6 so EN-locale operators see English logs end to end.
Adds nine entries to locales/{en,zh}.json: log.graph_api.m027-m029,
log.profile_generator.m024-m025, and a new log.retry.m001-m004
sub-namespace for the retry utility.
Closes#24
e60a5a93d3