Cross-post to LinkedIn when channel post is published

[SaharPak]

Context

When content is posted to the Tech Immigrants Telegram channel, it should automatically be published to the LinkedIn company page to reach a wider audience.

Requirements

• Detect new channel posts (bot must be admin in channel)
• Adapt content for LinkedIn (2000 char limit, hashtags, no Telegram formatting)
• Use LinkedIn Marketing API to post on behalf of the org page
• Support: text posts, text + image, text + link
• Include link back to Telegram for discussion

Setup needed

• LinkedIn App with w_organization_social permission
• Organization page access token
• OAuth 2.0 flow for initial auth (can be one-time manual step)

Acceptance Criteria

• Channel post triggers LinkedIn post within 1 minute
• Content is adapted (not just copy-pasted)
• Images are included when present
• Failures are logged, don't crash the bot
• Can be toggled on/off per channel