- New standalone script `bsky_post.py` to post text + optional image
or video to a Bluesky PDS instance. Supports --image, --video (mutually
exclusive), --alt, --lang, --service, --username, --password flags.
Reuses the same login-with-backoff pattern as rss2bsky and the Twitter bot.
- New Jenkinsfile that triggers every Thursday at 07:15 (cron: 15 7 * * 4),
reads credentials from Jenkins secret text entries, and runs bsky_post.py
with the configured image and Catalan language tag.
