Analytics: Facebook post comments need pages_read_user_content

[paulocastellano]

Facebook post metrics now show reactions, engagement rate, impressions (post_media_view), shares and clicks, but comments read as 0: reading comment counts needs pages_read_user_content, which our Facebook connect does not request (app/Http/Controllers/Auth/FacebookController.php, scopes around line 34).

• Submit pages_read_user_content for Meta App Review.
• Only after approval: add it to the Facebook (and Instagram via Facebook, if needed) connect scopes. Requesting an unapproved permission can break the login dialog for every user, so gate it behind config/env until approved.
• Existing Facebook channels must reconnect to grant it — decide how to prompt them.
• Verify the comments count lands in the snapshot and the card; test with Http::fake.
• While there: check whether Facebook reels published by TryPost (stored with a bare video id) duplicate the ones the analytics backfill imports.

Docs: https://developers.facebook.com/docs/graph-api/reference/post/ , https://developers.facebook.com/docs/permissions