- Changed `post_lang: str` to `post_langs: List[str]` in `run_once`
and `try_send_post_with_variants` to support multiple BCP-47 language
tags passed to Bluesky's `langs=` field.
- Updated `--lang` CLI argument to accept comma-separated language codes
(e.g. `--lang ca,es`), parsed into a list at startup. Defaults to `["ca"]`.
- Added startup log line reporting the configured language(s) per run.